The Ann Jellicoe play on which this movie is based is a much straighter affair. When Richard Lester came on board, he added his own unique touches such as straight-to-camera direct addresses, humorous subtitles and a Greek chorus of disapproving members of "the older generation".
Shot in four weeks.
Richard Lester: one of the reaction shots when Nancy, Colin and Tom roll the bed through the streets. He's the balding guy standing next to a lady with big hair.