I have recently had a scout around in the south east wales area. A lot of steelwork has now gone up at Severn tunnel station, But not enough for contact wires etc to be put in place. Further instalation of masts etc has happened west of the station, and is moving closer to Newport. Newport station is now close to 85% complete i think, with only 4 or 5 masts still to be installed. There are now more posts installed by lliswerry pond, with many having booms & registration arms etc ready for future wireing. I know that a lot of piling has been reported in the lliswerry / maindee area of the city (newport) as they are pushing on to newport station. And walking over somerton bridge earlier today, i did see evidence of this, with several piles being stacked awaiting usage. I could also see a fair amount of registration arms and a few booms - all awaiting instalation.
I have also seen (via youtube) video of network rail beginging piling work on platforms 3 & 4 at cardiff central.