Thank you Flap 40, 2s and DaveReid. That certainly echoes the B above and interlocking the A, I think my pic must be the British Airways Ltd badge but an older version. And yes it is a Lockheed L14 Super Electra. I've also found the BA Heritage website, where they say they have over 130 preserved uniforms from 1930 to the present day, with a contact email address, so I'll ask them too. Thanks everybody, I'll let you know how I get on!
