Funny this. Many of the most popular European cartridges have a British monica:

6.5x53R = .256 Mannlicher
6.5x54 = .256 Mannlicher-Schoenauer
7x57 = .275 Rigby
9.5 Mannlicher = .375 NE Rimless
10.75x73 = .404 Jeffery
etc etc

The stand-alones are the 8mm Mauser and the 9.3x62 (9.3x74R).

So within my limited rules, they win!