HMSs Canada, Erin, Agincourt and Royal Oak

HMS Canada was one of three battleships under construction for foreign powers in Britain in 1914 that were taken over by the Royal Navy.
HMS Erin was one of two Turkish battleships under construction in Britain that were seized for the Royal Navy at the start of the First World War.
HMS Agincourt was one of two Turkish battleships that had been completed in Britain just before the start of the First World War.
HMS Royal Oak was a Revenge class battleship, most famous for her destruction by U-47 while at anchor in Scapa Flow in 1939.