On the subject of odd laws, there’s an obscure clause of section 28 of the Town Police Clauses Act 1847 that makes it illegal to roll a barrel down the street or to put a washing line across the street and hang washing off it. Punishable by 14 days in prison apparently. The rest of it has some strange ones as well. Not quite in the same league as hooloovoo42‘s sex hovercrafts, but it comes pretty close.