I remember many years ago when I was an articled clerk being chastised for misspelling the word 'judgment/judgement', when referring to the decision of a court. I don't recall which way I spelt it, but remember afterwards looking it up in a dictionary, which confirmed that either spelling could be used. Since then, I have merrily alternated the spelling, as the whim took me. Until recently, that is, when I came across the 'Judgments' page on the Judiciary of England and Wales website, where they state:
"you may think we can't spell, but when we refer to a court judgment we have deliberately missed an “e” out. It is not entirely clear why, it's just the way it is spelt!"
Right, that explains it then.