Incorrectly regarded as goofs: 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, Gromit's calendar in one scene shows that 1 September is a Thursday, so the latest this film could be set is 1966). Yet Pesto's technology uses LEDs, which didn't become available until the mid-70s, and diode lasers, which weren't available to the general public until about 2000. However, Wallace has been shown to be a genius inventor, it's quite possible he invented all of these things himself, long before the items became available to the public.
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