His promise to turn last month's Royal Wedding into a 'nightmare' may not have materialised — but that won't stop Richard Dart from peddling his views about Britain's monarchy online.

'Prince William, Prince Harry and the Queen of England are guilty of funding and supporting the terrorist attacks that take place in Muslim lands,' he says adamantly in an internet video broadcast.

A Briton from Dorset who converted to Islam in 2009 and renamed himself Salahuddin (the son of teachers), Dart is one of several extremist Muslim preachers operating in the Tower Hamlets area of East London.

This vocal minority, who are causing increasing concern in the area, have lent this corner of the capital a new nickname — the Islamic republic of Tower Hamlets.

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