Tinker Tailor Solider Spy. I’ve never been so painfully bored at the cinema. Left after 30 minutes, which triggered a small flood of people to follow.

The book was terrible, tried re-reading it as an adult and couldn’t make it 5 pages. Loved it as a kid however, but even as a kid I hated the movie.

It’s a shame because he got steadily better, parts of book 2 and all of book 3 were excellent, although again this is from memory. He clearly struggled to write a decent ending, book 4 was good until the end.