[Bill Murray]

Hi David:

I can't claim any great knowledge of obscure British makes, but I think there is a chance your small postwar photo is a 1939-1940 Sunbeam-Talbot.

There is a very poor photo of such a six light saloon in Vanderveen's book "British Cars of the Late 1930's" that I don't think will scan well but I may try later.

In the meantime, here is a photo of a four light version of the car.
Cheers
Bill