The Queen suggested today that the City regulator, the FSA, had been too lax and toothless in the run up to the financial crisis in 2008.
Prince Philip, who accompanied the Queen to the Bank of England, warned bankers not to let the crisis happen again.
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Among those expected to attend the ceremony will be former US President Bill Clinton and ex-Northern Ireland first minister Peter Robinson.
Five people have been killed and 40 injured after a car and knife attack in London on Wednesday.
A wet, wintry night in places with rain and hill snow slow to move away from southern Scotland and northern England.