"We are calling on David Cameron to demonstrate the Christian values that he proclaims through actions and not just words when it comes to the problem of growing food poverty in the UK," said Reverend Keith Hebden, an Anglican priest and spokesman for the main campaign against food poverty in the UK, End Hunger Fast.

Police were called when Hebden accompanied the Bishop of Oxford, the Right Reverend John Pritchard - one of the UK's most senior religious figures - to Cameron's constituency office in Witney, Oxfordshire, to hand in a letter about food poverty signed by scores of church figures.