Coincidence of the Week

Here's something odd, then: On Sunday, in a Tesco car park, I was pushing our trolley of groceries back towards the place we'd parked when suddenly I saw what I thought was my car being driven away from me!  Same make, same model, same colour, and same registration plate!  I was just about to abandon our shopping and hotfoot it after the thieving toerags when I realised that the registration was actually one letter out - where mine ends with "N", this one ended with "M".  Otherwise, they were the same.

 What are the chances of that, eh?