Trivia: In the beginning of the movie, when the candy store owner is singing the candy man song, there's a spot towards the end of the song where he lifts up his counter to let all the kids in. Watch the little blonde girl as she gets walloped in the chin by the counter. (00:04:30)
Trivia: Even though Kenneth Williams plays Richard O'Callaghan's father in the movie, he was only 14 years older than O'Callaghan.
Trivia: For those who wonder about the sign at the lake drainage mechanism: it is actually the original Japanese wording of the warning spelled in Latin alphabet.
Trivia: The character "Fawkes" is widely assumed to be Guy Fawkes, who was not born until 23 years after Henry VIII's death. However a deleted scene (described in "The Lost Carry Ons" by Morris Bright and Robert Ross) makes it clear the character was intended to be an ancestor of Guy Fawkes.
Trivia: When Fielding is riding the subway, check out one of the punks that attacks the subway passengers - it is Sylvester Stallone in an uncredited role.
Trivia: The little boy who has an accident in the assembly hall at the beginning of the film is future "Grange Hill" and "Eastenders" actor Todd Carty.
Trivia: The film's original tagline was "Love means never having to say you're ugly!" in a play on the famous line "Love means never having to say you're sorry..." from the film "Love Story."