Let me be absolutely clear. We cannot say this often enough: this debate is not about whether we Brexit but how we Brexit. That is of prime importance. Decisions taken during the withdrawal process could have a huge impact on our economy and the prosperity of the people of this country. I do not accept the comments by the right hon. Member for West Dorset (Sir Oliver Letwin). The future of this country and its prosperity is of prime significance to the Members of this Chamber, and we have a right to discuss, debate and take a vote on it.
The people may have voted for Brexit—we cannot say this often enough, either—but they did not vote to be poorer. I echo the comments by my right hon. Friends the Members for Leeds Central (Hilary Benn) and for Doncaster North (Edward Miliband). The time for digs against and negative comments about those of us who want the best possible deal for the UK is over. It is time to move on and to be responsible and mature in terms of what we are looking for.
It is the responsibility of Parliament to explore what Brexit means, both for our constituents and, importantly, for businesses located in our constituencies. I shall take for an example a key sector of our economy—food and farming, the biggest manufacturing sector in the UK economy, with a value of more than £108 billion, providing 3.9 million jobs. Seventy-five per cent. of our agricultural exports are to the European Union.