Here's a clue. It's another of Meyerowitz's from-a-car photos from his 1966 UK visit.
This one clearly isn't a fake and - surprise, surprise - it's a Pan Am DC-8, which appears to be on final approach to Heathrow (probably on 28L and likely taken as the car passed the National, now BP, filling station on the A30 at Hatton Cross):
I'd suggest that another photo of the DC-8 taken a few seconds previously would be a dead match in azimuth and elevation for the one that's been superimposed on the Camberley photo.