Most up to date thread i could find about this
Latest issue of RAIL magazine has done an article on the Grand Union 802s for the Paddington to Llanelli service starting in 2021
The artist impression of the new trains show Transport for Wales livery on the trains?
The plan is for 8 trains made up of either 7 or 9 coaches and will start running in may 2023 (2 years after inital service start of may 2021). As said previously class 91 and mark 4 coaches will be used until then.
Not sure whether this has been mentioned before but Llanelli has been chosen as the service start and end point as it avoids longer layovers at Swansea
Grand union 802s layout will be slightly different to provide more cycle storage
With the kitchen put in between first and standard instead of being behind the cab as with other 80x trains
Sorry if some of this has been said before but just thought since nobody has posted an update on this yet i would in case
https://www.railmagazine.com/news/network/grand-union-class-802s-to-serve-llanelli-from-2023