Hello again!
Though not employed by the RN, the next are at least British-built: The Greek Wild Beast Class, originally built for Argentina, but hastily purchased by Greece for the Balkan Wars and named Aetos (Eagle), Ierax (Hawk), Leon (guess) and Panthir (guess again). Photographic reference indicates both the colous schemes below were in use at some point, but I could not find out when exactly and by which ship in the class.
They have already been drawn, and quite well (by Rey Ayanami, I think, who has meanwhile vanished from the Bucket), but the pics seem to have been swallowed by Majhost or some other monstrous entity.
Greetings
GD