PM must guarantee minimum defence spending, says former RAF head

Sir Michael Graydon says David Cameron must repair damage to UK security and commit to Nato minimum of 2% of GDP

David Cameron must repair the damage to UK security by guaranteeing a minimum level of defence spending, the former head of the RAF has said.

Sir Michael Graydon said any prime minister who wanted to be "remembered as a statesman" should take the opportunity to commit to maintaining the Nato target of spending a minimum of 2% of national income on defence.