Labour leader Ed Miliband has welcomed the move to establish a set of global standards to tackle tax evasion.
However, Mr Miliband also warned David Cameron that he must be prepared, if necessary, to get tough with any countries which refuse to comply.
Writing in The Independent, the Labour leader said Britain "needs to use all its considerable legal power and authority to ensure all the UK overseas territories and Crown dependencies which act as tax havens sign up".
More top news
A severe storm has caused flash flooding in the popular Spanish holiday resort of Malaga.
NHS trusts in England reported a third-quarter year-end deficit of £886 million against a target year-end deficit of £580 million.
Former Leeds United starlet Elliot Kebbie is now starting his career once again, at the age of 22, after years of setbacks.