OK, fess up time, average speed cameras caught me doing 40 in a 30 a week ago and the ticket has arrived today.
It names the road and the points in between which I was over the limit, which are in Meriden, borough of Solihull and under the jurisdiction of West Midlands Police, who have issued the ticket. But they have also stated that the road is numbered B4014, which is nowhere near here - it's in Wiltshire/Gloucestershire, some considerable distance away. The correct number is B4104.
Is this enough of a material error for me to contest the ticket and dodge the bullet?
Happy to hear an honest answer either way. If it's "no", then I'll do the decent thing and cough up, attend the speed awareness course or whatever, but as others have observed, if we ordinary citizens are expected to behave according to the letter of the law, then those enforcing the law ought to be held to the same high standards.