When Nick and Bing are stopped by police on the M6 motorway the officer tells Nick he was doing 92 in a 70 zone. London taxis are speed limited to 70mph. Furthermore British police do not patrol motorways on motorcycles because it is too dangerous.
Nick put a £1000 on a dog underdog but when they looks at the ticket it says £1.00 and he didn't even get the ticket. He just gave the money over and left.
Nick only just makes the train from Manchester to London before it leaves, but the man following him is already on the train waiting for him. There was no way for the man to know Nick would get that exact train beforehand, and in fact he very nearly did miss it.