Relatives of sailors who died on a British submarine lost more than 90 years ago are being sought for a memorial.
The wreck of HMS E18 was discovered last year on the bed of the Baltic Sea off the coast of Estonia.
She was one of a handful of vessels sent to the Baltic during the First World War by Winston Churchill, the First Lord of the Admiralty, to disrupt German shipments of iron ore from Sweden and support the Russian navy.
E18 left her base in the Russian port of Reval - now Tallinn, the capital of Estonia - on the evening of May 25, 1916, and headed west.
The following day she was reported to have torpedoed a German ship.
But a few days later, possibly on June 2, she is believed to have struck a German mine and sunk.