How are we defining “made”? For example, if I make a frame here in a Glasgow from Columbus tubing, is that British?
Frame, forks, bar/stem combo – that can all be built by a decent UK framebuilder. The problem parts will be mechs, chains, tyres and rims.
I saw it as a sliding scale – from uk-made out of uk materials/tools/etc all the way to uk-designed. First you look for best-case then if that doesn’t exist, move along the scale.
The argument about economy/etc isn’t the only factor (for me anyway) – it’s just about owning something that feels appropriate and I prefer to spec a bike and leave it like that than serial upgrading/swapping/etc. I’ve kept my current bike for 8 years with only a dropper post and tyres changing from original spec.
For example, another of the bikes I’m looking at is Canadian – I could easily get as excited by speccing as much of it as possible in Canadian-made parts.