^^ Don't know for sure that it's British built, but it's quite likely.
I doubt a 28.0 frame would come out at 29.0 even when powder coated so it's 28.6mm plain gauge.
If they bothered with Nervex lugs, it's probably 531 (or equivalent) rather than gas-pipe.
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
^^ Don't know for sure that it's British built, but it's quite likely.
I doubt a 28.0 frame would come out at 29.0 even when powder coated so it's 28.6mm plain gauge.
If they bothered with Nervex lugs, it's probably 531 (or equivalent) rather than gas-pipe.
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