The Daily Telegraph, which usually includes some good journalism about films, has just published a list of the Ten Best British Films Of All Time:
http://www.telegraph.co.uk/culture/film/classic-movies/10027283/10-best-British-films-of-all-time-chosen-by-David-Gritten.html
There's plenty to argue about here, and although I would not dispute Don't Look Now, Kes, and Kind Hearts and Coronets, there is nothing by Hitchcock (in his pre-Hollywood phase), Bill Forysth (especially Local Hero) or John Boorman (Excalibur or Hope and Glory).
Other major omissions are Peter Greenaway, Ken Russell and Terry Gilliam.
Trying to compile a list of best films is about as much use as speculating about who will be the new Doctor Who!!!