64 in a 30 might not be as bad as it sounds, as speed limits these days give no indication at all of the ideal safe speed at which to drive. In my area we have straight rural roads with no side turnings and no pedestrian access which have a 30 limit, and roads in the middle of a village with lots of pedestrians on the approach to an unguarded level crossing where the limit is NSL/60. (These two locations are less than 5 miles apart!)
But the bigamy aspect of this case is interesting.

Given that the gentleman concerned is 57 years of age, it seems likely that he was not born here, but lived in his home country and married both his wives there, or at least outside of Britain.
Merely coming to the UK would not, IMO, make him a bigamist. Instead, the law should (and probably does, except in this speeding case) recognise his first marriage but not the second, for the purposes of British law (divorce laws, capital transfer tax, intestacy laws etc.). In America, for example, most states forbid marriage to one's first cousin, whereas it's allowed in Britain. For a married couple of which each person is the first cousin of the other to go to America does not make them criminals, but if one of them were then to obtain resident alien status, the spouse
cannot also obtain resident alien status on the grounds of being married to a resident alien because their marriage would not be recognised in US law. In the eyes of the law, they would simply be a law abiding unmarried couple.
But this speeding case is different. This guy has managed to pull a fast one - and I'm not talking about exceeding the speed limit. He has managed to manipulate the decision arrived at by the court by citing a marriage that should not be recognised by UK law, which includes or should include the legal processes within a magistrates' court. The only reason the magistrates can have for not imposing the punishment that I would have received for the same offence is because they were afraid of appearing to be racist.
This sets an alarming precedent, and also spotlights yet again the muslim capacity for setting double standards. If his second wife had been Heather Mills, and she divorced him and wanted half of his wealth, you can be sure that this guy would cite the fact that the marriage to her had no legal basis in UK law and that he owed her nothing.
It would be interesting to hear from fisherman about this case.
Personally, I am appalled.