The pound has fallen sharply after a series of political heavyweights threw their weight behind a UK exit from the European Union.
Sterling dropped by three cents to a near seven-year low against the US dollar at just above $1.40. It has not seen such lows since March 2009.
The fall of more than 2% left the pound heading for its steepest one-day decline versus the US currency since early 2009 at the height of the recession.
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