Heathrow Airport closed all day Friday 21 March 2025 Posted by infoman at 04:50, 21st March 2025 | ![]() ![]() ![]() ![]() |
due to a power outage,please post the info on your many transport sites,as its gonna be chaos.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by TaplowGreen at 06:13, 21st March 2025 | ![]() ![]() ![]() ![]() |
due to a power outage,please post the info on your many transport sites,as its gonna be chaos.
BBC News - https://www.bbc.co.uk/news/live/cly24zvvwxlt
Heathrow closed all day after nearby fire causes power outage - BBC News
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by CyclingSid at 07:58, 21st March 2025 | ![]() ![]() ![]() ![]() |
Is this a single point of failure?
How many other airports/airfields could be at similar risk?
Hope somebody has a spare transformer in the (very big) cupboard.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by CyclingSid at 08:03, 21st March 2025 | ![]() ![]() ![]() ![]() |
From BBC Live coverage
Nearby rail services are also taking a hit
It's not just flights - trains around Heathrow are also being disrupted today.
The Heathrow Express, which connects the airport with Paddington station, says there are no services in either direction today, and is advising people not to try and travel to the airport.
On the Elizabeth Line, Transport for London says there is no service between Hayes & Harlington and Heathrow Airport, with severe delays between Paddington and Hayes & Harlington.
So far, Transport for London says that there is good service on the Piccadilly Line.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by Ralph Ayres at 10:05, 21st March 2025 | ![]() ![]() ![]() ![]() |
Possibly not much point running an excess of trains to/from Heathrow today, as it might just encourage intending passengers to turn up and wait in vain. Still staff needing to get there though some may have been told not to bother coming in, and it's also quite a useful coach travel hub for non-air travel, assuming the bus/coach station has enough power to operate (ditto of course the various rail stations).
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by broadgage at 10:41, 21st March 2025 | ![]() ![]() ![]() ![]() |
Is this a single point of failure?
How many other airports/airfields could be at similar risk?
Hope somebody has a spare transformer in the (very big) cupboard.
How many other airports/airfields could be at similar risk?
Hope somebody has a spare transformer in the (very big) cupboard.
Unless a spare transformer is stored on site, or very nearby, replacement will take some time, and may require special manufacture.
I would expect power to be restored within a day or so, via an alternative route and from another transformer. This may have been achieved already.
Restarting the complex systems at Heathrow probably takes some time.
In the meantime, if an emergency requires this, aircraft could almost certainly still land.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by Electric train at 10:57, 21st March 2025 | ![]() ![]() ![]() ![]() |
Is this a single point of failure?
How many other airports/airfields could be at similar risk?
Hope somebody has a spare transformer in the (very big) cupboard.
How many other airports/airfields could be at similar risk?
Hope somebody has a spare transformer in the (very big) cupboard.
It certainly seems Heathrow's eggs are all in one basket. It is poor resilience planning on the part of the Airport and the Electricity Supply Industry.
There seems to have been an internal catastrophic arc fault inside the transformer. These transformers have a device called a Buchholz relay https://en.wikipedia.org/wiki/Buchholz_relay which trips the supply and outgoing circuit breakers in the event a surge (oil / gas) and if it detects any gassing over a period of time.
Any arc internally will produce gasses, Hydrogen, Oxygen and Acetylene, also it has to be born in mind that an electric arc in what is in effect a sealed container produces extreme explosive pressure.
It is normal practice for large Grid transformers to have transformer monitoring systems such as https://camlingroup.com/kelvatek/asset-monitoring/asset-monitoring-products/transformers-monitoring and have a constant remote condition monitoring to a control centre.
What I have noticed is the lack of blast wall between the two 400/275kV / 123kV transformers (main and reserve transformers) and from the news feeds I have seen the second transformer has suffered fire damage which make a recharge of it unlikely.
I will say the "rumours" of a carelessly discarded cigarette is extremely unlikely, transformer mineral insulating oil has a very high flash point greater than 140C Grid sites have been strictly no smoking areas for many years
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by TaplowGreen at 12:17, 21st March 2025 | ![]() ![]() ![]() ![]() |
Power has been restored to Terminals 2 & 4 which were apparently the worst affected.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by CyclingSid at 12:25, 21st March 2025 | ![]() ![]() ![]() ![]() |
I have to acknowledge that I am not a great fan of another runway at Heathrow.
"It certainly seems Heathrow's eggs are all in one basket." Adding another runway would make the situation worse; Gatwick, o
Luton or Stansted if you must.
Is all this another example of induced demand, as seen on roads? Build more and you get more, ad infinitum. Ironic that there is another closure of the M25 this weekend.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by Mark A at 13:01, 21st March 2025 | ![]() ![]() ![]() ![]() |
Thanks for that. Ah. Blast walls. That reminded me of my unhealthy interest in taking photos of electricity-related infrastructure. Here's a photo of a transformer and associated set of blast walls on the site of Bath's vanished power station. I'm rather hoping that there's some additional structure within what is otherwise a rather tall brick wall that you'd think would be prone to being pushed over if anything gave it enough of a nudge.
Mark

Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by stuving at 13:25, 21st March 2025 | ![]() ![]() ![]() ![]() |
Heathrow's supply comes from at least two grid supply points, the nearest two being North Hyde to the north (the one that went bang) and Laleham to the south. But there are others further away that could be included if resilience is the valued highly enough. SSEN distribute power from both, but UKPN also operate at Laleham. The nominal supply area for North Hyde GSP is attached - it does not include much of the airport. But of course the big question is why the multiple supply routes to the airport did not give it a resilient supply. That's for HAL and perhaps SSEN to answer, rather than NGESO.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by Electric train at 14:20, 21st March 2025 | ![]() ![]() ![]() ![]() |
The nominal supply area for North Hyde GSP is attached - it does not include much of the airport.
But just happens to be Term 2 & 4 along with ATC and other critical infrastructure
But of course the big question is why the multiple supply routes to the airport did not give it a resilient supply. That's for HAL and perhaps SSEN to answer, rather than NGESO.
There is either a serious design flaw, lack the right switchgear systems / control system or lack of competent people
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by stuving at 15:31, 21st March 2025 | ![]() ![]() ![]() ![]() |
From the BBC, in a page with further details:
With Heathrow being such a busy airport for passenger journeys and global trade, questions have been raised over whether it has back-up systems in the event of power cuts.
The BBC understands that Heathrow does have back-up power for its key systems, but kickstarting these alternative power supplies for the whole airport takes time.
A source said it was not possible to switch the power back on immediately.
A Heathrow source also told the BBC that they have "multiple sources" of energy at the airport – with diesel generators and "uninterruptable power supplies" in place.
They added when the power outage happened the back up systems "all operated as expected".
The systems, however, are not enough to run the whole airport – hence the decision to close it down.
The source said the airport is in the process of redirecting power to the affected parts of the operation – but that it "takes time".
And even once the power is back on, there are countless systems which need to be rebooted and checked to ensure they are working properly and are stable.
The BBC understands that Heathrow does have back-up power for its key systems, but kickstarting these alternative power supplies for the whole airport takes time.
A source said it was not possible to switch the power back on immediately.
A Heathrow source also told the BBC that they have "multiple sources" of energy at the airport – with diesel generators and "uninterruptable power supplies" in place.
They added when the power outage happened the back up systems "all operated as expected".
The systems, however, are not enough to run the whole airport – hence the decision to close it down.
The source said the airport is in the process of redirecting power to the affected parts of the operation – but that it "takes time".
And even once the power is back on, there are countless systems which need to be rebooted and checked to ensure they are working properly and are stable.
I would not surprised if international standards require critical systems for air operations - navigation aids, and everything that allows an aircraft to land and clear the runway at least - to be backed up independently of outside supply, and perhaps with backups for those backups. That much they are saying did work as intended.
I wonder if the fact that that was in place meant they did not worry so much about security of external supplies. So everything not critical got handled on the basis of manually reconfiguring the network - but remember that this is a big part of supply resilience at all levels (it's why restoring supply, as this morning around the dead GSP, takes several hours). And as they say, running an airport safely, even in an emergency basic no-frills mode, needs a lot more power that they (and their DNO(s)) can restore via new routes within a few hours. In this case that was the result of a commercial decision made by HAL.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by stuving at 15:35, 21st March 2025 | ![]() ![]() ![]() ![]() |
Eorostar have been running a few extra trains today - four, according to French TV news, though I could only see two when I looked online. Not much, in terms of the total number of diverted passengers, but no doubt it's good publicity to do something (and bad to do nothing). Plus, there's money to be made!
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by IndustryInsider at 15:37, 21st March 2025 | ![]() ![]() ![]() ![]() |
Plus, there's money to be made!
I saw reports that hotels were exploiting the situation by doubling, tripling and perhaps more, their standard room rates.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by Clan Line at 15:58, 21st March 2025 | ![]() ![]() ![]() ![]() |
There is either a serious design flaw, lack the right switchgear systems / control system or lack of competent people
Very profound statement - based on

Perhaps the substation control room was pretty close to the fire - or the blast wall (well illustrated by MarkA) was about to collapse - and the night shift decided to leave ..............quickly !
Stuving has summarised what did happen at Heathrow itself............everything essential worked ! The airport was still capable of handling aircraft - even if that was only to tell them to go elsewhere.
Closing the airport entirely was the correct decision............imagine the chaos today if they hadn't.
Just supposing Heathrow had 100% electricity back up (at what enormous cost ?) - the surrounding area had lost all power. No trains, no properly functioning roads (M4 was/is shut), no nothing ! What would be the point of trying to keep the airport open ?
What happened at North Hyde will unfold - making unfounded statements will help no one in the mean time.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by Bob_Blakey at 16:33, 21st March 2025 | ![]() ![]() ![]() ![]() |
I am taken back to the late 1980's when I started my employment with a large telecommunications company that had just established a new data centre (DC) in Exeter. The DC supported all the company's business application IT for Cornwall (inc. the IoS), Devon and a significant part of Somerset. Staff numbers were around 150 people and it was a 24/7 operation.
Pretty small beer compared to Heathrow Airport.
As part of the new employee 'tour' we discovered that the building had two separate mains power supplies, which could be switched over very rapidly, two fairly hefty UPS (Uninterruptible Power Supply) battery packs which automatically fired up in a matter of seconds in the event of a mains power failure, and a diesel generator which could be brought online in 10 minutes . These units were fully tested on a quarterly basis.
It seems to me that, given the importance of LHR in the national picture, Heathrow Airport management, possibly aided & abetted by the National Grid, have completely failed to render the site as operationally secure as should have been the case (e.g. automatic switching to one of the alternative mains power supplies should have been an absolute requirement).
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by Electric train at 16:37, 21st March 2025 | ![]() ![]() ![]() ![]() |
There is either a serious design flaw, lack the right switchgear systems / control system or lack of competent people
Very profound statement - based on

Perhaps the substation control room was pretty close to the fire - or the blast wall (well illustrated by MarkA) was about to collapse - and the night shift decided to leave ..............quickly !
Stuving has summarised what did happen at Heathrow itself............everything essential worked ! The airport was still capable of handling aircraft - even if that was only to tell them to go elsewhere.
Closing the airport entirely was the correct decision............imagine the chaos today if they hadn't.
Just supposing Heathrow had 100% electricity back up (at what enormous cost ?) - the surrounding area had lost all power. No trains, no properly functioning roads (M4 was/is shut), no nothing ! What would be the point of trying to keep the airport open ?
What happened at North Hyde will unfold - making unfounded statements will help no one in the mean time.
There is no control room at North Hythe, NG operations control is in Sindlesham, Wokingham in Berkshire, SSE and UKPN have theirs located in a number of places in the UK.
I was refereeing to the control of electrical power within Airport
A location of stratigic National importance such as Heathrow should have a robust backup system whilst they 100% may not be warranted they should be able to run core business at a acceptable degraded mode
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by TaplowGreen at 16:42, 21st March 2025 | ![]() ![]() ![]() ![]() |
Flights resuming later today - pretty impressive recovery all in all............
From the BBC
We've just received a fuller statement from Heathrow Airport, which says it can restart some flights later today and hopes to be fully operational tomorrow:
"Our teams have worked tirelessly since the incident to ensure a speedy recovery. We're pleased to say we're now safely able to begin some flights later today.
"Our first flights will be repatriation flights and relocating aircraft. Please do not travel to the airport unless your airline has advised you to do so.
"We will now work with the airlines on repatriating the passengers who were diverted to other airports in Europe. We hope to run a full operation tomorrow and will provide further information shortly.
"Our priority remains the safety of our passengers and those working at the airport. As the busiest airport in Europe, Heathrow uses as much energy as a small city, therefore getting back to a full and safe operation takes time. We apologise for the inconvenience caused by this incident."
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by Clan Line at 17:08, 21st March 2025 | ![]() ![]() ![]() ![]() |
A location of stratigic National importance such as Heathrow should have a robust backup system whilst they 100% may not be warranted they should be able to run core business at a acceptable degraded mode
As I said, the "robust back up system" did work, if an aircraft HAD to land at Heathrow last night it could have done so safely. Trying to keep an airport running when everything around it has failed is just asking for even more trouble. "Degraded mode" = what ? Burger King open but not McDonalds ?
Strangely enough, before I retired, I actually worked at an airport setting to work a "robust back up system" such as is probably installed at Heathrow - albeit on a much larger scale at Heathrow. This was not designed to keep the airport restaurants running at that airport either.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by Electric train at 17:26, 21st March 2025 | ![]() ![]() ![]() ![]() |
A location of stratigic National importance such as Heathrow should have a robust backup system whilst they 100% may not be warranted they should be able to run core business at a acceptable degraded mode
As I said, the "robust back up system" did work, if an aircraft HAD to land at Heathrow last night it could have done so safely. Trying to keep an airport running when everything around it has failed is just asking for even more trouble. "Degraded mode" = what ? Burger King open but not McDonalds ?
Strangely enough, before I retired, I actually worked at an airport setting to work a "robust back up system" such as is probably installed at Heathrow - albeit on a much larger scale at Heathrow. This was not designed to keep the airport restaurants running at that airport either.
My current job is looking after the traction power system for a large chunk of South London along with a number of major London stations. There are always weak spots in a system especially older systems, the modern systems can operate a N-1 including a total loss of a National Grid connection in SE London, a reduced service would have to be implemented but it would not be a total shut down
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by Clan Line at 17:36, 21st March 2025 | ![]() ![]() ![]() ![]() |
............ hefty UPS (Uninterruptible Power Supply) battery packs which automatically fired up in a matter of seconds in the event of a mains power failure .............
Sorry Bob - but you are making unsubstantiated statements about Heathrow and the National Grid. To provide full backup power for Heathrow ("as much energy as a small city") is economically impossible to contemplate.
I regret to say that your statement regarding UPS is also a little wide of the mark. A UPS does not "fire up in a matter of seconds" when power is lost (in today's digital age this this could be equally catastrophic) - it is on line all the time. A "proper" (not £9.99 from Amazon) UPS is usually fed from a battery, this battery is kept fully charged by the mains supply - if the mains supply fails the UPS continues to supply the load, now depending solely on the battery. There is NO break in the UPS output. This continues for the time specified by the customer. This normally gives the time required to get the diesel up and running - or for non-critical equipment, to carry out a controlled shut down.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by broadgage at 00:32, 22nd March 2025 | ![]() ![]() ![]() ![]() |
Agree that a UPS provides "no break power" rather than "firing up in seconds"
My relatively cheap UPS provides power without any detectable break, to loads that I consider important (fridge freezer, some lighting, internet router, cordless phone base unit, cellphone charger. It runs indefinitely on mains power and for about 24 hours on battery.
It cost about £50 for the UPS and about £200 for the long run time batteries.
Much larger units are available, up to MEGAWATTS.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by Clan Line at 10:03, 22nd March 2025 | ![]() ![]() ![]() ![]() |
I note, this morning, that the cause of the Heathrow shutdown was................ready for this ?.............because
Terminal 2 was burning wood chips to provide power......................................I didn't read any further


Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by broadgage at 10:33, 22nd March 2025 | ![]() ![]() ![]() ![]() |
I note, this morning, that the cause of the Heathrow shutdown was................ready for this ?.............because
Terminal 2 was burning wood chips to provide power......................................I didn't read any further

Terminal 2 was burning wood chips to provide power......................................I didn't read any further


I am opposed to the burning of wood chips for electricity production due to this fuel being almost always imported and of very doubtful greenness.
I fail to see though how it would cause or contribute to the power failure, as distinct from the burning of natural gas or oil.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by Clan Line at 14:02, 22nd March 2025 | ![]() ![]() ![]() ![]() |
I fail to see though how it would cause or contribute to the power failure, as distinct from the burning of natural gas or oil.
Exactly, just another inane, stupid comment from an "expert" ....................which brings to mind Ed Millibland (sic)

Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by TonyK at 18:17, 22nd March 2025 | ![]() ![]() ![]() ![]() |
I would not surprised if international standards require critical systems for air operations - navigation aids, and everything that allows an aircraft to land and clear the runway at least - to be backed up independently of outside supply, and perhaps with backups for those backups. That much they are saying did work as intended.
In a dire emergency, an aircraft can be landed on a runway without any of the electrical systems working, so long as the pilot can see it from a few miles away. Instrument landing systems and PAPI lights are always welcome, but even the most modern aircraft can be landed using the Mark 1 human eyeball. I had a lot of fun landing an A330 at Heathrow last week (in a pilot training simulator, not Flight Sim or a real aircraft) and it isn't hugely different in principle to a Piper Cherokee apart from height and speeds - which surprised me. It would be a problem if nobody knew you were coming though - the runway maintenance crews took immediate advantage of unexpected available time to go and sort a few things out.
Airport closures happen all the time, but seldom on this scale. The normal practice is to divert, either to another airport in the same country, or somewhere en route, and wait for a resumption. That poses its own problems, with crew hours, refuelling, possibly deplaning passengers and accommodating them, and in the case of A380s, limited airports with the right kit.
The fire seems to have started accidentally, with the 25,000 litres of cooling oil (I read cooking oil first time) being the fuel. A mistake by an engineer has been suggested ("Whoops! My bad...") but I think that is conjecture. The resilience aspect is certainly going to be the topic of a few urgent conversations, for sure. The BBC report mentions back-ups, UPS, all that. I don't think Heathrow will want any chance of this happening again.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by ellendune at 18:47, 22nd March 2025 | ![]() ![]() ![]() ![]() |
The BBC is reporting
There are also backup diesel generators, and uninterruptible battery-powered supplies which provide enough power to keep safety critical systems such as aircraft landing systems running.
However, when the fire broke out the substation, it was out of action, along with its backup.
However, when the fire broke out the substation, it was out of action, along with its backup.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by stuving at 20:07, 22nd March 2025 | ![]() ![]() ![]() ![]() |
The BBC is reporting
There are also backup diesel generators, and uninterruptible battery-powered supplies which provide enough power to keep safety critical systems such as aircraft landing systems running.
However, when the fire broke out the substation, it was out of action, along with its backup.
However, when the fire broke out the substation, it was out of action, along with its backup.
That's very badly worded. What it's trying to say is that the fire destroyed one transformer and damaged the surrounding equipment so that both circuits were put out of action.
The North Hyde grid supply point is fed by two underground cable circuits from Iver grid switching substation (and GSP). Each is rated at about 400 MW, but the grid operates on the principle that any circuit (or anything else) can be taken out of service without any user losing supply, so the GSP as a whole is rated at 400 MW. So it's not strictly a backup, but the effect is the same. There is a plan to put in a third link, I think at the same rating, which would raise the GSP's capacity to 800 MW.
PS: In fact, this is the plan -
There is planned 275kV circuit reinforcement on NGET’s network between Iver and North Hyde with an estimated completion date in the early 2030s. The existing Iver – North Hyde 1 and 2 circuits need to be replaced and uprated to a larger capacity. Build of a third circuit between the two sites is also planned. Alongside this, NGET are also undertaking a wider, strategic review of the 275kV cable circuits in West London and future network requirements.
However, ETYS24 - last year's ten-year statement from NESO (was NGESO) - does not mention that. Note that the GSP is not overloaded now, but the demand is forecast to rise very steeply. In what's called the Future Energy Scenarios that are used for planning, total grid demand rises from 48 GW this winter to 73 GW in 2031/32. For the North Hyde GSP it rises from 173 MW to 431 MW!
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by ChrisB at 15:07, 23rd March 2025 | ![]() ![]() ![]() ![]() |
Heathrow got back up & working without the substation that was damaged being repaired - so power must have been fed from the the other two substations that feed Heathrow. Apart from maybe a a bit of switching circuits, I reckon Heathrow had power from likely before lunchtime, but having said that the airport was staying shut until midnight, decided that it was prudent to stay with that, rather than open immediately.
The CEO was interviewed and said that all systems worked as they were designed to.
so why did the coolant oil catch fire & how? The flash point for that oil is 140 degrees C. So what heated to that point?
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by Electric train at 06:46, 24th March 2025 | ![]() ![]() ![]() ![]() |
A location of stratigic National importance such as Heathrow should have a robust backup system whilst they 100% may not be warranted they should be able to run core business at a acceptable degraded mode
As I said, the "robust back up system" did work, if an aircraft HAD to land at Heathrow last night it could have done so safely. Trying to keep an airport running when everything around it has failed is just asking for even more trouble. "Degraded mode" = what ? Burger King open but not McDonalds ?
Strangely enough, before I retired, I actually worked at an airport setting to work a "robust back up system" such as is probably installed at Heathrow - albeit on a much larger scale at Heathrow. This was not designed to keep the airport restaurants running at that airport either.
My current job is looking after the traction power system for a large chunk of South London along with a number of major London stations. There are always weak spots in a system especially older systems, the modern systems can operate a N-1 including a total loss of a National Grid connection in SE London, a reduced service would have to be implemented but it would not be a total shut down
Seems my option that Heathrow Airport should have been able to supply the Airport from the other 2 GSP as widely reported in the media is backed up by the boss of National Grid
https://www.bbc.co.uk/news/articles/cdjy4m0n1exo
There is no doubt a war of damage limitation of the 2 public listed companies going on to protect from reputational damage, political focus, not to mention the clams for costs from Airlines.
As I said in my original post on Friday, I am surprised the Heathrow were not able to reconfigure the supplies, something they should have been able to do that night, the only thing that then my have effected flights was the smoke from the fire.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by stuving at 12:23, 24th March 2025 | ![]() ![]() ![]() ![]() |
Seems my option that Heathrow Airport should have been able to supply the Airport from the other 2 GSP as widely reported in the media is backed up by the boss of National Grid
https://www.bbc.co.uk/news/articles/cdjy4m0n1exo
There is no doubt a war of damage limitation of the 2 public listed companies going on to protect from reputational damage, political focus, not to mention the clams for costs from Airlines.
As I said in my original post on Friday, I am surprised the Heathrow were not able to reconfigure the supplies, something they should have been able to do that night, the only thing that then my have effected flights was the smoke from the fire.
https://www.bbc.co.uk/news/articles/cdjy4m0n1exo
There is no doubt a war of damage limitation of the 2 public listed companies going on to protect from reputational damage, political focus, not to mention the clams for costs from Airlines.
As I said in my original post on Friday, I am surprised the Heathrow were not able to reconfigure the supplies, something they should have been able to do that night, the only thing that then my have effected flights was the smoke from the fire.
One company that is keeping its head well below desk level is UKPN. They manage the distribution network at Heathrow, as an independent DNO (or the equivalent). But they have put out some quite hubristic stuff about this role in the past, e.g. this:
Security and reliability of electricity is essential for all airports. Heathrow is no exception. Even an interruption of a few seconds could have a knock-on effect on baggage systems and cargo shipments. This could take many hours to resolve and lead to significant lost revenue and passenger disruption. Resilient power is also vital to the entire airport community: including passenger transport services, employees’ facilities, freight and cargo operators, passenger retail or restaurants, emergency services, rail links, and airlines themselves.
Providing 24/7/365 resilient power to a global transport hub requires continuous innovation and dedication. This means around-the-clock maintenance, repairs, and renewals to thousands of high voltage electrical substations, transformers, relays, and more than 600km of cables...
Approach and innovation
As strategic energy infrastructure partner, our approach has been to work with Heathrow to deliver world-class performance every single day. The faultless maintenance of critical energy infrastructure of this scale and density is vitally important: the risks to people, property and businesses from electricity cannot be understated if not managed correctly.
Providing 24/7/365 resilient power to a global transport hub requires continuous innovation and dedication. This means around-the-clock maintenance, repairs, and renewals to thousands of high voltage electrical substations, transformers, relays, and more than 600km of cables...
Approach and innovation
As strategic energy infrastructure partner, our approach has been to work with Heathrow to deliver world-class performance every single day. The faultless maintenance of critical energy infrastructure of this scale and density is vitally important: the risks to people, property and businesses from electricity cannot be understated if not managed correctly.
... and a world class excuse generator?
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by TonyK at 15:13, 24th March 2025 | ![]() ![]() ![]() ![]() |
I think we are still in the phase of this incident where everybody tries to blame everybody else. Next will come the small matter of deciding who pays for all the expense. Hopefully, there will time for proper "wargaming" of the systems before too long, something that would have strengthened the response had it happened before, but may have been omitted because there had been no previous problems. I'm sure there will be chance one night for a simulation to develop a process for a quick recovery should it happen again.
Re: Heathrow Airport closed all day Friday 21 March 2025 Posted by Electric train at 17:08, 24th March 2025 | ![]() ![]() ![]() ![]() |
Seems my option that Heathrow Airport should have been able to supply the Airport from the other 2 GSP as widely reported in the media is backed up by the boss of National Grid
https://www.bbc.co.uk/news/articles/cdjy4m0n1exo
There is no doubt a war of damage limitation of the 2 public listed companies going on to protect from reputational damage, political focus, not to mention the clams for costs from Airlines.
As I said in my original post on Friday, I am surprised the Heathrow were not able to reconfigure the supplies, something they should have been able to do that night, the only thing that then my have effected flights was the smoke from the fire.
https://www.bbc.co.uk/news/articles/cdjy4m0n1exo
There is no doubt a war of damage limitation of the 2 public listed companies going on to protect from reputational damage, political focus, not to mention the clams for costs from Airlines.
As I said in my original post on Friday, I am surprised the Heathrow were not able to reconfigure the supplies, something they should have been able to do that night, the only thing that then my have effected flights was the smoke from the fire.
One company that is keeping its head well below desk level is UKPN. They manage the distribution network at Heathrow, as an independent DNO (or the equivalent). But they have put out some quite hubristic stuff about this role in the past, e.g. this:
Security and reliability of electricity is essential for all airports. Heathrow is no exception. Even an interruption of a few seconds could have a knock-on effect on baggage systems and cargo shipments. This could take many hours to resolve and lead to significant lost revenue and passenger disruption. Resilient power is also vital to the entire airport community: including passenger transport services, employees’ facilities, freight and cargo operators, passenger retail or restaurants, emergency services, rail links, and airlines themselves.
Providing 24/7/365 resilient power to a global transport hub requires continuous innovation and dedication. This means around-the-clock maintenance, repairs, and renewals to thousands of high voltage electrical substations, transformers, relays, and more than 600km of cables...
Approach and innovation
As strategic energy infrastructure partner, our approach has been to work with Heathrow to deliver world-class performance every single day. The faultless maintenance of critical energy infrastructure of this scale and density is vitally important: the risks to people, property and businesses from electricity cannot be understated if not managed correctly.
Providing 24/7/365 resilient power to a global transport hub requires continuous innovation and dedication. This means around-the-clock maintenance, repairs, and renewals to thousands of high voltage electrical substations, transformers, relays, and more than 600km of cables...
Approach and innovation
As strategic energy infrastructure partner, our approach has been to work with Heathrow to deliver world-class performance every single day. The faultless maintenance of critical energy infrastructure of this scale and density is vitally important: the risks to people, property and businesses from electricity cannot be understated if not managed correctly.
... and a world class excuse generator?
I agree about the excuse generator

However it is still down to Heathrow Airport to have processes in place 24 / 7 to manage business interruption. A major failure of a GSP is certainly something that is under constant consideration in the Southern Region of Network Rail