'Diana Dors screamed about George Best while rubbing herself against a young man': how we made Deep End

'A friend,' recalls director Jerzy Skolimowski, 'told me a story about a diamond that was lost for ever after being dropped in snow. I thought: "But you could grab the snow, melt it and get it back." It seemed a great idea for a film' I had problems in Poland with my film Hands Up! It had a strong anti-Stalinist message and the government withdrew it from the Venice film festival and banned it. I was told I couldn't make that kind of film any more in Poland. So I took the first available project...