I have just ordered train simulator 2013 for my PC. it looks good with 4 UK routes. with London Paddington to Oxford, London Victoria to Brighton, Newcastle to York and The isle of wight line. Looks good and can't wait to play it.

http://www.amazon.co.uk/Train-Simulator-2013-PC-DVD/dp/B0094B88TG/ref=sr_1_1?ie=UTF8&qid=1355255873&sr=8-1