The 'Reading Lines', the 'Windsor Lines', the 'Windsor Side' (of the whole station), the 'Reading and Windsor Line' (as it passes through Richmond or wherever)...
Various names heard at different times for any or all of that four track 'branch line' that turns off the 'Main Lines' at Clapham Jn.
As said above the 458/5s are intended to be used predominantly on the inner routes which have recently been the preserve of the 'high capacity' variant of the 450 - the 450/5. So Windsor/Weybridge/Hounslow loop services. The 450/5 are being partially un-modified to get their first class seating back, although the extra stand back space by the doors is being retained, so although these latter trains are being used as part of the general 450 fleet they are retaining their /5 numbering.
I explicitly asked in the last
SWT▸ webchat if the internal cascade of 450s would results in fewer
DMUs▸ being used on purely third rail routes, and the answer was yes they would, (
but before anyone asks they do not become available for other franchises), as the second part of the '108 vehicle' improvements includes strengthening mainline services, including some on the Salisbury route.
Although the 456s were initially touted in some of the rail press as lengthening many main suburban services to ten car, this is not yet generally the case because it would require platform extensions at Waterloo. So the result of the 456 cascade is seen mostly on mainline routes, where various long distance services are being augmented eg from 8 to 12 car, or 6 to 9, and as mentioned this includes some morning trains from Yeovil Jn and Salisbury, and to Exeter in the evening peak.
An unexpected change which highlights that this is not solely about '10 car trains' is that the Guildford Ascot route is to be operated by single or paired 456s - freeing up the 5 current units (a mix of 458 and 450) for use elsewhere.
It is assumed in
EMU▸ groups that the definite swap is that the 6 car 159 operated Portsmouth to Basingstoke and then to Waterloo service that runs weekday mornings (the 0642 peak extra semi-fast off Basingstoke) will be the obvious DMU diagram to be definitely changed to EMU operation.
While all these internal cascades are happening though, the 455 fleet is also being life extended with an AC traction package like those on most modern
DC▸ EMUs, so this will take a couple of units at a time out of action during a period of a few years as well.
SWT issued press releases on the two phases of the project; the editors notes (particularly in the second one) explain some of the knock on effects on mainline routes:
http://www.southwesttrains.co.uk/extracapacity.aspxhttp://www.southwesttrains.co.uk/extra-capacity-on-south-west-trains.aspxI've consolidated all the service alterations intended into one list, hopefully
showing that the major effect of the 456 cascade is outside the suburban area.
DMU service alterations are also highlighted:
Phase 1 ^ resulting from the 458/460 reform to 458/5s:
The additional carriages will enable trains on the following routes
to be lengthened from 8 to 10 cars:
Waterloo-Windsor & Eton (Riverside),
Waterloo-Weybridge via Brentford and Staines,
Waterloo-Hounslow via both Richmond and Brentford.
This will be achieved through the introduction of 60 Class 460 vehicles which
will be combined with the existing Class 458 stock to form 36x5-car trains.
An internal cascade will provide two additional Reading services in the morning
and evening and one further Hounslow peak service into London Waterloo.
It will also further lengthen seven South West Trains mainline services:
Morning peak
Southampton Airport Parkway to Waterloo (8 car to 12 car)
Portsmouth Harbour to Waterloo via Eastleigh (5 car to 10 car)
Southampton Central to Waterloo (4 car to 5 car)
Evening peak
Waterloo to Poole (5 car to 8 car)
Waterloo to Portsmouth Harbour via Eastleigh (5 car to 8 car)
Waterloo to Portsmouth Harbour via Eastleigh (8 car to 10 car)
Waterloo to Alton (8 car to 12 car)
[no times were given in the first announcement]
Phase 2 - resulting from internal cascades after
delivery of the 456s from Southern:
Mainline services:
0515 from Yeovil Junction (6 car to 9 car)
0543 from Salisbury (6 car to 9 car)
0600 from Haslemere (5 car to 8 car)
0642 from Basingstoke (6 car to 8 car)
0650 from Portsmouth Harbour via Eastleigh (8 car to 12 car)
0844 from Alton (5 car to 8 car)
1620 to Exeter (6 car to 8 car)
1720 to Exeter (6 car to 9 car)
1723 to Basingstoke (8 car to 12 car)
1741 to Basingstoke (8 car to 12 car)
1750 to Exeter (6 car to 8 car)
1841 to Basingstoke (8 car to 12 car)
Suburban services:
0717 from Guildford via Cobham (8 car to 10 car)
0807 from Guildford via Cobham (8 car to 10 car)
0817 from Woking (8 car to 10 car)
1702 Guildford via Woking (8 car to 12 car)
1732 Guildford via Woking 8 car to 12 car)
1757 Twickenham via Kingston (8 car to 10 car)
1848 Guildford via Cobham (8 car to 10 car)
Windsor lines:
1705 Aldershot via Richmond (4 car to 8 car)
1713 Teddington via Richmond (8 car to 10 car)
Additional services:
0722 from Raynes Park
0922 from Raynes Park
Paul