There's a bit more to it than squeeze the punter until the pips squeak.
Brompton has the best customer support of any bike company I know of in terms of parts inventory and published workshop instructions - there's an expanded diagram available online for almost every repair/maintenance task.
All this is a genuine cost to the business which Brompton can presumably only recover from the price of the bike/bits because that's their only source of income.
I believe the heavy metal work is done in South Wales, and paint is also outside London, so Brompton has taken steps to reduce costs while staying in the UK.
As a general point, I'm told China and the Far East is not the bargain to manufacture in it once was, partly due to increasing wage costs.
That's something to be welcomed, given the benefit was based on slave labour.
Eastern Europe is now just as cheap as China, if not cheaper, and one of my ebike company buddies tells me it's almost as cheap to assemble in the UK.
Now there's an innovation.