That is absolutely right, and I completely agree with the right hon. Gentleman. I come to the point that the hon. Member for Lincoln (Karl McCartney) made about the Conservative party—[Interruption.] And, admittedly, about some people from the Labour party. Some say that the pledges were made primarily by people who may have been members of a Conservative Government, but who did not speak with the authority of that Government. Of the five Cabinet Members I have mentioned who took leading roles in the campaign, three were members of the Government at the time and one, the Foreign Secretary, attended the political Cabinet. Part of the reason why those key campaigners were put up to do media and to campaign for Vote Leave was that they carried the authority of being Ministers. We cannot detach one from the other.
The other, and connected, argument that is made is that the commitment was given by one side in a referendum campaign, not by a Government, so we should leave the matter alone and get on with things—we should all shut up. I am sorry, but I do not think that that will wash. Whether they were Ministers or not, all the key Vote Leave campaigners were Members of this House. As I have said, if our democracy is to mean anything, it is that Members of this House answer and are held to account in this House for the promises that they make to the people. After all, as has been said, they campaigned in the name of parliamentary sovereignty. If Parliament is sovereign, they should be held to account here.