The currency's tumble is also part of a global selloff on almost every asset class as investors made a beeline for dollar cash, in many cases to fund redemptions from mutual funds. The dollar is up more than 2% against a basket of currencies <=USD>.

The currency fell to a low of $1.1452 while against the euro too it weakened around 3% at 94.33 pence, the lowest since March 2009.

(Reporting by Sujata Rao)