Continuity mistake: has a scene set during the Festival of Britain (1951). Oldman and Molina are shown at night on the South Bank of the Thames, ostensibly having just attended the Festival. In the background is a very clear view of New Zealand House, which wasn't built until the early 1960s, some ten years after the scene was supposed to take place.
Kenneth Halliwell: I can't remember when you last touched my cock. Well, I can actually. It was about two years ago. Only I can't remember the actual date. Pity. I could have put it in my diary. "The last time Joe touched my cock. Grouse shooting begins"
Kenneth Halliwell: I just want to go to the awards! I could! Look, "Joe Orton and guest." I'd behave. I wouldn't say a word, I promise.
Joe Orton: No.
Kenneth Halliwell: Why?
Joe Orton: Because it's for me. I wrote it.
Kenneth Halliwell: I gave you the title.
Joe Orton: Okay, so when they have awards for titles, you can go to that.