The Daily Mail reports: “Details of a 'referendum lock' to prevent more powers being handed to Brussels without the British people having a say will be published today.”

Bill Cash was quoted as saying "Talk of a referendum lock is just milk and water – it is a million miles away from what is required.

We were promised a Sovereignty Act in our manifesto and that is what is needed and what the British people deserve. We are told there will be a referendum if there is any further transfer of powers, but we are already seeing the transfer of powers and there is no referendum."