4. Corwen, with a rather drunken looking lamppost in the background 

Bit strange that, given that usually an out and back from Westbury would be cancelled if there’s a shortage of crew, rather than two unrelated ‘half trips’

It wouldn’t surprise me if the 13:15 runs from Swindon (train 2M26), and the last train of the day from Swindon, the 22:31 to Westbury (train 2M36) ends up being cancelled.

3. is Portsmouth and Brighton to Warminster (and Dilton Marsh), pre-dating the May 2022 removal of the through GWR^▸ (Great Western Railway) Brighton to Bristol/Great Malvern services (and also the end of on-board catering, which I learn from this Forum was from April 1st 2022).

12. is Trowbridge.

1. Is the Swanage Railway’s DMMU (Diesel Mechanical Multiple Unit), a class 117 leading a class 121 ‘bubble car’ between Corfe Castle and Norden.

Neither train is particularly unusual in it’s own right, but the fact that they are registered for mainline running, and have carried fare-paying passengers on the national network in recent years, does make them unique.

Sadly those days seem to have passed, and I don’t expect they’ll be seen running into Wareham under their own power anytime soon.

9. Barry Island

The building in the background features in another picture, but I won’t say which so as to stay within the rules of the game

BSK^▸ (Brake Standard Corridor (carriage)) is Basingstoke; I’ve made many journeys starting from there, and at other times changed trains.

4. Is Shottle on the Ecclesbourne Valley Railway.

That may not be all.

A study of the Real Time Trains departures from MKM^» (Melksham (Station code) - next trains) for today currently shows that after the 11:31 to Westbury has left, the next service that has a specific train allotted to it is the 20:25 to Swindon https://www.realtimetrains.co.uk/search/detailed/gb-nr:MKM/2024-11-30/0000-2359?stp=WVS&show=passenger&order=wtt

Faresaver may be busy this afternoon….

And also

From RTT^» (Real Time Trains - website), 22 additional GWR^▸ (Great Western Railway) services at Bath (BTH^» (Bath Spa - next trains)) this Saturday;

https://www.realtimetrains.co.uk/search/detailed/gb-nr:BTH/2024-11-30/0000-2359?stp=S&show=passenger&order=wtt&toc=GW^▸ (Great Western)

Could running via Bristol Parkway be driven, at least partly, by the requirement for crew changes there I wonder?

Filton Abbey Wood also not the best place to be turfed off your train if your car happens to be parked in the large car park at Bristol Parkway...

Whilst I can see the frustration of the additional delay for passengers travelling from South Wales to London, I can also see good reason to run via Bristol Parkway in this situation.

It does rather.

Noting that the previous service of the train to form the 07:45 from Westbury to Swindon is the 06:13 Bristol Parkway to Westbury, according to RTT^» (Real Time Trains - website) this had a unit swap at Bristol Temple Meads from 158767 to 166218. The 158 arrived at Temple Meads 12 minutes late, but the 166 left 63 minutes late at 07:43! I wonder if the “shortage of train crew” could relate to needing a driver to bring 166218 from a siding somewhere to form the onward working to Westbury?

In any event, clearly the 07:45 to Swindon would be, at best, a late start when the train to form it had only just left Bristol at 07:45. Unfortunate that it couldn’t have run as far as Chippenham, even with a severe delay, in order to start the return working to Westbury from there, but I suppose a decision was made that the risk of delay to other services was too great?

Looking just now on RealTimeTrains, this train is now showing as starting from Westbury at 13:09. I grant that the source is unofficial, but someone somewhere on the railway must have input the information that feeds RTT^» (Real Time Trains - website), seemingly at 09:13 this morning.
RTT also shows the line:

Not a good way to encourage custom if the official sources of information aren’t kept up-to-date, but it seems likely this train will run between Westbury and Chippenham, and therefore the return at 13:57 from Chippenham to Weymouth also likely to run.