Can you help to identify these frames, bikes or parts?

^^ Don't know for sure that it's British built, but it's quite likely.

A good place to start might be to see if the frame number points toward the bigger UK builders, I know Holdsworth did build plain gauge reynolds frames with Nervex lugs, I'm sure they weren't alone

Frame numbers are also stamped on the steerer tube, so don't worry if you can't read it through the powder coat

Evening,

I've just had the forks off and the stamp on the steerer tube (thanks for pointing out that's where it would be Rik) matches what I thought I could see under the powder on the BB - reading '5000'.

I'm not sure where that would point, but if it is 60s or so and is a simple consecutive numbering pattern, I'd imagine a smaller builder?

The frame on eBay has the same lugs and 531 tubing - and the owner seemed sure it was Holdsworth, but I'm not sure what evidence he has for that. Everything seems to point at Holdsworth, but I'd have thought that if it is 60s, then with Holdsworth's consecutive numbering system, the frame would have a higher number.

Any thoughts?

Any ideas where I might start given the info I have?

Cheers, Mat.