This 35mm screening, which is part of the Pinter season (full details here), is also screened on July 15th (full details here).
Time Out review:
Clive Donner's version of Harold Pinter's funniest and most famous play is creditably straight and subdued. Avoiding cinematic intrusions, he allows three of the greatest stage interpretations of Pinter's characters to speak for themselves. Donald Pleasence gives so strong a performance as Davies the tramp that he has never quite been able to escape from it since. Alan Bates and Robert Shaw are both far more restrained than their subsequent careers would lead you to expect. It's rare for a film to rely so heavily on its actors and still be worth watching.
Here (and above) is an extract.