Can only think of a couple of British high-selling tent brands, Vango (including Lichfield) and Gelert - the others seem mainly to be Danish or American owned!
There are a few UKCS members who work in the camping retail industry who will probably give you a better idea.
------------- Experience enables you to recognize a mistake when you make it again.
Everything has been said before, but since nobody ever listens we have to keep going back and saying it all over again and again and again