Need help identifying proof marks

[Beerhunter]

It was made at RSAF Enfield in north London.

At the time Enfield was in Middlesex.

As an administrative unit, the county of Middlesex was lost with the advent of the Greater London Council in 1965. However there is still a geographic county called Middlesex and a First Class cricket team!

[gsimmons]

Thanks, Beery
Of course. I didn't think it was London, but I had forgotten where and looked it up. That's when I was led astray.....