I have a plastic 3 year senior card issued only last July, has that been changed since then? 

A driving licence is a strange thing, compared to other forms of licence.

It requires a significant amount of training, and the person is then in possession of a licence, which allows them to be in charge of a vehicle which could do a lot of damage if used incorrectly. There is also a significant amount of law around driving, with changes every so often.

Now in most areas like this, there is a requirement for Continuing Professional Development. A driving licence isn't so different from these, and yet it's just seen as such an everyday skill or right that there isn't the same requirement to keep up knowledge and understanding. Indeed, every so often I see clickbait to articles about how drivers are "only just realising" something that they really should know if they are on top of their game.

Perhaps there should be more of an effort to ensure drivers are up to date with changes, and are actively aware of things. It could be as simple as providing an annual update, requiring acknowledgment, or a simple theory re-test every X years. I don't think it would be popular, given that driving is often seen as a basic life skill and right (there would be more than a few "I've been doing it for 30 years and not had a crash" comments) but at the same time I'm very aware that a driver is able to wield a lot of damage if they don't know what they're doing, and really ought to be aware of what they should be doing! Perhaps it should be a condition of insurance, and paid for by the insurer, on the basis that CPD may reduce the total cost of payouts!

It happens in a small way - for example sending some on Speed Awareness courses. But that's more reactionary than 'normal' CPD!

Edit: I don't drive. Maybe this already happens and I just haven't noticed!

I wonder if a Delay Repay claim would be accepted on the basis of being informed of a cancellation and planning around that.

A somewhat similar situation with TfW^▸ (Transport for Wales) recenty. The Manchester-Carmarthen (or something like that) was affected by disruption at Hereford, and the rest of the journey was cancelled. I had been intending to take it from CDF^» (Cardiff - next trains) - it was a 4/5 car and likely to be not too busy. Then I saw it was cancelled. In this scenario it's not unusual for a replacement train to start at Cardiff; however, I checked Journeycheck, Tiger and RTT^» (Real Time Trains - website), and couldn't see any sign of a reinstatement from CDF.  I chose not to take the (2 car) stopper immediately after it because the cancellation would have pushed people onto the shorter train; I made a choice to wait for the next IET^▸ (Intercity Express Train - the now official name for the replacement for HSTs (manufactured by Hitachi in Kobe, Japan)).

I think it was just after the booked departure time that a headcode suggestive of a replacement train appeared on RTT, and not long after that the replacement showed on Tiger and Journeycheck. But by that point I had made other plans.

This is a bit different from the 'cancelled all day and then reinstated' scenario, as the operator was working with an issue that had just arose, so it is understandable that the information was late to arrive. However from the customer perspective the replacement train didn't exist until the last minute, and it would therefore be legitimate to think of the train as still effectively cancelled. It's still an inconvenience, however, and the business should be thinking about how this affects the customer if, for example, they were to make a Delay Repay claim on this basis. (I don't think I bothered on this occasion, as I'd chosen to miss the train after it as well.)

Something to bring up at their Stakeholder meeting in June?

Agreed. But just to point out that the issue I had (first post) seems to be something different - the service was initially showing as 'delayed', probably from about 05:00 to 05:45. Then it changed to 'departed at 05:13'. So presumably nothing to do with train crew and/or predictions of whether it would run or not; an IT glitch of some sort would be my guess, possibly supported by the fact that a number of visited stops down the line showed 'information unavailable'?

Recently retired from First bus, so was able to take advantage of reduced train fares.
Last used last week.
Pnz to Reading to meet daughter and both back to Pnz by the next train.
Strangely enough in walking down to the platform at Reading to go to our Zone slot, one of our bus supervisors was also waiting to return to Cornwall on the same train.
Returned daughter to Paddington on the following Sunday.  My wife came with us for company.
Wife and myself caught the same train back.
It was 15 minutes late into Paddington, so just enough time to grab a few sandwiches from Upper Crust (nearest platform!) and back on the same train.  Seems sandwiches are not available at weekends.
Congratulations to the train prep crew as we left on time.
Mostly on time on the way back, but slowing down on the approach to Plymouth tunnel, I bought up OTT^▸ (Open Train Times website, or possibly 'over the top', depending on context) but couldn't see a platform problem.
Train Manager announced a delay as we were waiting for a platform.  OTT showing two vacant platforms.
A slow pull in to Plymouth, 1 late.
Many people started to board with heavy luggage which was odd for Plymouth. Catering crew asked where they were going "Paddington" came the reply. "We've just come off another London train having being told to catch this one". Then a PA^▸ (Public Address) advising this/our train terminating here and returning to London, take the subway to platform 7 and catch that one.
Big crush with people trying to get on and off and collecting respective luggage!
Subway and stairs congested with platform 7 to 4 movers; and platform 4 to 7 movers.
Left Plymouth 25 late with profuse staff apologies.
Arrived 33 late into Pnz.

Way off topic (sorry).

When my staff pass does expire/is taken back, might consider a 3 year senior railcard, but not sure if I/we would use it enough.

As someone far more professionally involved than me ... are you able to help with a timeline for each?   

P.S. I also overlooked the Beatle Crossing

You have overlooked Toucans, where two can cross at the same time - pedestrians and cyclists (unless they have been renamed in the years since I was involved in installing them).

I was paid cash in hand, by the foreman down in the pub on a Friday afternoon, at one of my first jobs. Quite extraordinary now when I think back to it. And certainly remember £1 notes.

More on topic, I have a physical card, so renew it each year at the ticket office. I did have a 3 year card until you had to have that on a phone, and reverted back to an annual card. Happy to pay the extra for that to help keep the ticket office open.

And who remembers the £1 Senior Citizens Away Day back in the 1980's

Our BR^▸ (British Rail(ways)) weekly pay packets were made up with £1 notes during the time the offer was running, who remembers being paid weekly cash in hand and £1 notes?