I have just come back from a return journey from London to Swindon, I only saw the up/northside on both legs though.
Airport Junction to Reading:-About 30-35% piling complete, either side of Burnham there about 20 masts installed with about half of them have cross sections fitted.
Reading area to Tilehurst:-Very little change from when I last travelled on the section at the end of last year as regards electrification, a few piles installed opposite the train depot have been installed though.
Tilehurst to Didcot:-I guess that nearly all of the piling is complete and around 70% of the masts are up with about 35-40% of the cross sections fitted.
Didcot to Swindon:-Around 30-35% pilling complete, nearly all of this is between Didcot to just after where the line goes back two tracks.
No support arms have been fitted anywhere yet apart from the Reading train depot which has been half wired for quiet a time now and just east of Swindon on the up side two sidings have been fully wired, I think this is for training purposes or something along those lines.
There is a new feeder station which is well under way just west of Didcot station.
I believe that the piling target each night is 18 and recently Amey have started to hit the target, so it says here:-
http://www.railtechnologymagazine.c...at-western-electrification-is-behind-schedule