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@Jonny69
Yep, Nervex Pro lugs. Those were introduced in the mid to late 50s as a factory-made lug that looked like a hand-cut fancy lug. I think that's a mid 50s or 60s British frame. Looks nice. There's a bit about Nervex lugs on Classiclightweights if you haven't seen it: http://www.classiclightweights.co.uk/components/nervex.html
I'd say those round forks belong with it. I think you'll probably have to trawl Classiclightweights frame builders section and look for the clues which are the seat cluster and the lobster claw dropout, though they were common dropouts back then! You can see the frame number, though, and quite a few of the builders' pages on Classiclightweights have the frame numbering conventions listed.