[4] In May 1902 she was taken into Portsmouth for a refit, and on 16 August that year she took part in the fleet review held at Spithead for the coronation of King Edward VII.[5] The following month she visited the Aegean Sea with other ships of her squadron for combined manoeuvres with the Mediterranean Fleet, returning to Portsmouth in October.[6] Late that year she was ordered back to Gibraltar for temporary service in the Mediterranean to protect British interests in Morocco.This operation was intended to block the harbour mouth and prevent the transit of German U-boats and other raiding craft from Bruges to the North Sea.German countermeasures were, however, too effective, and Brilliant and fellow blockship HMS Sirius were eventually destroyed by their crews outside the harbour mouth after running aground on a sandbank.