Boris Johnson has compared the the UK economy to the Costa Concordia cruise ship disaster. London's Mayor made the comparison during his address to the Institute of Directors, adding "the keel is off the rocks".
The Costa Concordia is being recovered almost two years after capsizing, an accident in which 32-people died. Two of the bodies still haven't been found.
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A lamp in the tower which houses Big Ben is to be switched off for the first time in more than 70 years.
Sir Bruce entertained audiences for more than seven decades.
Work in the tower will also pause over the bank holiday weekend.