David Cameron, September 2007: “Today, I will give this cast-iron guarantee: If I become PM a Conservative government will hold a referendum on any EU treaty that emerges from these negotiations.”

David Cameron, January 2013:  “If elected in 2015, a Conservative Government will hold an in-out referendum on a new settlement with the EU – stay in the EU on these new terms; or come out.”

David Cameron, 2010 manifesto: “We will raise the inheritance tax threshold to £1 million to help millions of people who aspire to pass something on to their children.”

David Cameron, yesterday: “[Inheritance tax is] something we’ll have to address in our manifesto. I believe in people being able to pass money through the generations and pass things on to their children.”

Why should we believe you this time, Prime Minister?