Looking for movie
May be you can try moonlightcinemanetworks.com. It has a large collection of movies.
Please see if you get the answer of your question.
Possibly NUNS ON THE RUN but as I haven't seen the movie I can't be sure.
Subject:
I have no clue who starred in the film it was a comedy, and it may not even be a British film... came out perhaps 80's...