This is modern day, set in the UK. Character A is a complete film buff, character B isn't so much. Character B is writing a book about the goings-on on the set of a film. A quick comment is made about the book being like some film which centres around the production of a film.
Which film could this be?
The only one I could think of was The French Lieutenant's Woman, but I was wondering if there was something that might be a bit more obvious.
I've searched for variations of "films about films", "films involving film production" and "making films in films".
If anyone has any more obvious searches I could try or other suggestions for films that would be great.