 DATE: The prices in the fairground scene at the Giant Vegetable  Contest are in the old pounds, shillings and pence, showing that  this film is set before this form of currency was abolished on 15  February 1971 (indeed, Gromits calendar in one scene shows that 1  September is a Thursday, so the latest this film could be set is  1966). Yet Pestos technology uses LEDs, which didnt become  available until the mid