For most of the movie, the license number of Martin's Jaguar is LGF 123. But when he stops for his rendezvous with the crooks, the rear license plate says NKX 7.
At the end of the film, Tom is boarding what is supposed to be a flight from London back to New York City, but the plane is clearly a short-range model not capable of Trans Atlantic travel.
When Tom Martin and Barney Wilson are discussing a rendezvous, Martin refers to the dancer Mayura, which is the name of the actress playing the dancer. Her character name is Yasmina.