I know it's early but i've found the PC version for under £24. Ordered from Shopto before, got the game a couple of days early.
http://www.shopto.net/PC/VIDEO GAMES/PCFO14-Formula 1 2011 F1.html
The console versions of the game are on there too for around £35
http://www.shopto.net/PC/VIDEO GAMES/PCFO14-Formula 1 2011 F1.html
The console versions of the game are on there too for around £35