The drop in the GBP/USD at the start of this week has been nothing short of astonishing. In less than 48 hours the pair erased more than 1000 points off its price depreciating by more than 6% against the dollar. Although cable has been in decline since the turbulent markets of last fall, this latest freefall carries a whiff of true panic about it as markets fear that that UK government spending schemes to rescue the country’s ailing banking sector will put unsustainable stress on the Treasury.