Funny that as train diversions are supposed to be occurring until the 3rd (to include the 3rd). Diverted via Banbury meaning Swindon - Paddington has been taking 2.23 mins instead of 1 hour.
I'd seriously check the journey again before buying a ticket but seeing as it's FGW, half the literature floating around is probably wrong!
Major engineering work will be taking place in the Reading area over the Christmas and New Year Period.
The main effects of the engineering are that Reading station will be closed completely on Monday 27, Tuesday 28, Wednesday 29 and Thursday 30 December (there are no train services on Saturday 25 or Sunday 26 December during the Christmas shutdown). Also, the following routes will be closed at various times between Monday 27 December and Tuesday 4 January:
Between Maidenhead and Didcot Parkway via Reading
Between Reading and Basingstoke via Mortimer
Between Reading and Theale
Between Reading and Wokingham
Between Twyford and Henley-on-Thames
Between London Paddington and Greenford (this allows for the diversion of other First Great Western services)