Q 9 Although there are many references, both web-based and hard copy, to this phenomenon, I'm happy to concede that it is an urban myth and several other years, including 1866, also did not have this in February. Please go with your instinct.
Q 38 Most references refer to 'arm' and rather than 'legs'. There may also be two possible answers!
71 Since writing the question, three reference sources have changed!! The statement in the question is no longer true. However, this postcode WAS the only code with a zero until the Royal Mail software didn't like some of the others and they had to use zeros in a few other places too!!
Just give the postcode which was the only one with a zero until the Royal Mail updated the others. There was an historical reason behind it.