I am suspicious of this 'Hobbs' frame. Here's the description:
"This is a project for Hobbs enthusiast. It is one of the last frames built (1951) as you can see from the number on the steerer. I intended to bring it back to its former glory, but time and health issues have scuttled that plan. The head badge is a copy of the original. It is not brass and enamel. However it is a good copy (see photo)."
The number on the steerer is 1973. It also has Nervex lugs and the Blue Riband didn't have those. Check this out, it shows a pic of the 1951 Blue Riband lugwork:
http://www.classiclightweights.co.uk/hobbs.html
So... dodgy date, dodgy lugs and dodgy head badge? Nope... I will NOT be bidding on it.
Edit: The top of the seat stays is wrong too.
Further down in that article is a pic of a guy racing in 1949 that was taken by Len Thorpe. He took pictures of me racing in the mid 1960s (the one in my avatar included!).