One curious footnote, though. After writing the screenplay, I met up with Jenny for the first and only time since we broke up. We had dinner in Venice Beach, California. We talked about life, friends, everything - but not about what had happened between us.

I gave her the script to read on the flight back to London. Some time later she wrote me a letter. She loved the story, she said. It had surprised and moved her because she really related to Tom. Yes, incredibly, Jenny hadn't recognised herself as Summer at all.