How do David Cameron's tax cut figures add up?

David Cameron has pledged to cut taxes for 30 million people if the Conservatives win next year's election.

In a speech which ended his party's conference, the prime minister said he would raise the tax-free allowance from £10,500 to £12,500 by 2020.

He also said the threshold for the 40p income tax rate would be raised from £41,900 to £50,000 by the end of a five-year Conservative government.

But how do his figures weigh up when the government has to find £25bn in new spending cuts, beyond those already in the current spending review?

Duncan Weldon reports for BBC Newsnight.

  • Business