The U.K. will increase its funding to the International Monetary Fund and will urge its European neighbors to do the same, Chancellor of the Exchequer Alistair Darling said.

Writing an op-ed in the Guardian newspaper ahead of this week's meeting of Group of 20 finance ministers and central bankers, Mr. Darling said the G-20 will need to forge ahead on financial reforms, going further to ensure tax havens comply with global standards, and bankers' pay doesn't exacerbate risky behavior.