Sir Julian Lewis: If the Prime Minister is right that our food standards are already in alignment with those of the EU, why could we not have negotiated the deal on the basis of mutual recognition of those standards, as other countries have done, rather than open ourselves up to having to alter our standards in line with whatever the EU may decide to change in the future?

[The Prime Minister: That is a very good question that the right hon. Gentleman should put to Boris Johnson.]