A Fine old Bentley Mark IV car parked on the roadside

This is a picture of a fine old Bentley Mark IV car parked on the side of a road with the passenger sitting in the car. By zooming into the tax disc on the window I can see that the tax expired in Sept 1963 which suggests this picture was taken up to a year before that date. I found some information about car registrations on this site, which informs me that the plate KLD 532 is a London registered car which was made sometime after 1948.