Parliamentary Voting System and Constituencies Bill

May I deal with the issues raised by the hon. Member for Cleethorpes (Martin Vickers)? He has a great deal of expertise on this issue, and I am grateful to him for contributing to the debate. He proposed giving the Boundary Commissions flexibility to vary the number of seats assigned to each of the four nations by a small amount. The flexibility proposed in his amendment 228—a margin of 2% on either side of the proportionate entitlement—would not work for Wales or Northern Ireland, as was recognised by the hon. Member for Foyle (Mark Durkan). It would not allow the commissions there to increase or reduce those nations' allocations, as 2% of their national entitlement would not equal one whole seat. However, there are more fundamental objections to the amendment. It would enable the Boundary Commissions for England and for Scotland to increase or decrease the total number of MPs in the House and the proportion of MPs who represent their part of the UK. Parliament should lay down clear rules for determining the number of constituencies, and they should be allocated to the four parts of the UK in proportion to their electorate. We are seeking equality between the nations as well as within them. Finally, I want to deal with the amendments tabled—although not spoken to, obviously, because of his absence—by the Chair of the Political and Constitutional Reform Committee. They would require the Boundary Commissions to decide between themselves the size of the House at each review, until the figure of 600 was reached in 19 years' time.