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epa04165119 An undated handout photograph made available by the British Ministry of Defence on 12 April 2014 and to be released on 13 April 2014 shows British Navy submarine HMS Tireless at an undisclosed location at sea in 2013. The British Royal Navy and the Royal Air Force are making contributions to the Australian-led search for the missing Malaysian airliner MH370 in the southern Indian Ocean. Following a request by the Malaysian authorities for support from the Royal Navy, the survey ship HMS Echo was diverted from her patrol in the Indian Ocean, and the nuclear submarine HMS Tireless has also been re-tasked to help in the search to find the black box flight recorder from missing MH370. EPA/DAN ROSENBAUM/MOD / HANDOUT MANDATORY CREDIT: CROWN COPYRIGHT HANDOUT EDITORIAL USE ONLY/NO SALES