#UnionRMT – The BBC reports that the union leader of the Rail and National Union of Rail, Maritime and Transport Workers (RMT), Bob Crow has died at the age of 52 of a suspected heart attack.

Leading the RMT from 2002, Mr Crow became one of Britain's most high-profile union leaders.

Union, industry and political figures have been paying tribute to him.

London Mayor Boris Johnson, who often clashed with him, said Mr Crow had "fought tirelessly" for his members. Labour's Ed Miliband said he had been a "passionate" campaigner.

The prime minister's official spokesman said David Cameron offered his sincere condolences to Mr Crow's family and friends.

And Liberal Democrat leader Nick Clegg said Mr Crow had been a "fighter and a force".

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