Normally when something like this happens there is a currency crisis following close behind.

A silent $1 trillion "Run on Britain" by foreign investors was revealed yesterday in the latest statistical releases from the Bank of England. The external liabilities of banks operating in the UK – that is monies held in the UK on behalf of foreign investors – fell by $1 trillion (£700bn) between the spring and the end of 2008, representing a huge loss of funds and of confidence in the City of London.