The wreck of a British naval submarine lost for more than 90 years has been found in the Baltic Sea off the coast of Estonia.

HMS E18 - with its complement of three officers and 28 ratings - went out on patrol in May 1916 and was never seen again.

E18 left its base in the Russian port of Reval - now Tallinn, the capital of Estonia - on the evening of 25 May 1916 and headed west.

The following day she was reported to have engaged and torpedoed a German ship. A few days later, possibly 2 June, she is believed to have struck a German mine and sunk with all hands.

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