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 guarantee from City Hall to bankroll the annual £2-3m bill was a key planning condition imposed by Westminster and Lambeth councils.
Detectives in Westminster are investigating after the man was discovered on the Route 189 bus in Marylebone shortly after midnight.
The plaque at number 16 Cowley Street in Westminster marks the brown brick Georgian townhouse where Sir John lived for 31 years.