After reading the list I carried out a quick calculation and realised that I had seen 34 of them. Many of the others are on one or other of the many mental lists I have of films that I've read about and would like to see at some point - perhaps a long trawl through the DVD section of eBay and some quiet nights in could help me boost my score.
The Daily Telegraph has produced a BAFTA special photo gallery covering all the films:
http://www.telegraph.co.uk/culture/culturepicturegalleries/9848319/Bafta-special-the-49-best-British-films-of-all-time.html
In truth I wouldn't mind seeing any - or all - of them again. the real challenge would be to nominate the fiftieth film. Possibly something by John Boorman? Excalibur?