Can someone identify this aircraft part?

[Nighthawke]

Going slightly off topic but on the Barnes Wallis theme. I had a day out at the Midland Railway a couple of years ago and one end of the line is at Hammersmith station where the sign proudly says " Birthplace of Sir Barnes Wallis" - just a piece of trivia but nice to see especially when you don't expect it.

[wingers]

As always with older aeroplanes try asking the question on the Flypast Forum. Despite its resent web rebuild / downgrade there are still many knowledgeable people on there.

www.forum.keypublishing.com/forum/histo ... -Aviation=

I have registered with them several days ago but still waiting in the "moderation queue" before I can post my question - but thanks for suggestion