The Ukulele Shop was based in London quite some time ago, but then moved its headquarters to Berlin. Richard was English, and Jana was German. I understand they moved to Berlin for family/personal reasons. The on line store continued functioning most satisfactorily (from the customers' point of view), but Richard told me the switch to Germany had caused some difficulties, so they decided to wind up the ukulele side of their business, and concentrate on other things.
The Southern Ukulele Store is a new British on-line seller of ukes. I've bought from them, and they are most satisfactory to deal with.
stores.shop.ebay.co.uk/Southern-Ukulele-Store__W0QQ_armrsZ1QQ_
John Colter (Ukantor)
Edit: that link doesn't work - just google Southern Ukulele Store