Well done Searat! By giving us these names you may call yourself the winner although the ship pictured isn't HMS Collingwood, nor St. Vincent, nor Vanguard!
Confused? That was the intention. The ship pictured is actually the SS Perthsire made to look like HMS Vanguard. She was one of the Royal Navy's dummy battleships; ex-merchant vessels, converted in 1914 to make them look like British battleships and battlecruisers & thus fooling German intelligence and Naval Command.
Other ships disguised this way were: City of Oxford/St Vincent, Michigan/Collingwood, Montezuma/Iron Duke, Ruthenia/King George V, Tyrolia/Centurion, Oruba/Orion (pictured below), Mount Royal/Marlborough, Montcalm/Audacious, Princess/Ajax, Cevic/Queen Mary, Manipur/Indomitable, Patrician/Invincible & Merion/Tiger.
Your next Searat!