“It takes seven people to make our jeans,” said Faye Toogood, the co-founder and designer of the Toogood fashion label, from her studio in east London.

“See these initials on the inside of the pocket?” She gestured to some jeans so voluminous and rigid that they could easily stand of their own accord. “This is the ‘passport.’ It details everyone involved, from weaver to the finished product.” And what it reveals is that Ms. Toogood’s denim line is the first of its kind to be designed and constructed entirely in Britain.

Wait … denim? Britain? Indeed. Meghan Markle is not the only American icon being remade in a British mode.

“Thirty years after the last cotton mill in the U.K. closed down, production is returning, and our garment-making infrastructure is growing,” said Adam Mansell, the chief executive of the UK Fashion and Textile Association . Mr. Mansell believes that artisanal denim production is a natural evolution of British manufacturing — and the next chapter of Made in Britain.