You mis-heard.
That would be a U-boat from Germany.
Yep & The U-31(1st of the U-212 class) is widely regarded as the best D/E sub in the world,followed closely by the French Scorpene-both these variants were designed after the Gotlands & better than it(in sensors & weaponry).
WHAT! it just came out of the Used Sub Dealer's shop. Should be under warranty.
No I didn't misread. I'm well aware it was a submarine, a USED submarine - no longer deamed suitable for the British navy. But a NEW submarine from the Swedes or Germans would have been cheaper - especially since the boat will require a total refit - AGAIN...