<sod >The pound slumped in the wake of the data, dropping to $1.3804, down 0.8 per cent on the day, as traders bet against a May interest rate from the Bank of England due to the weakness of GDP.< eod>< sod > The pound slumped in the wake of the data, dropping to $1.3819, down 0.7Â per cent on the day, as traders bet against a May interest rate from the Bank of England due to the unexpected weakness of GDP.< eod>