My Lords, the Parliamentary Voting System and Constituencies Act 2011 was the subject of the fiercest and longest debates I have witnessed in this House. At the time my party was seeking a route to change to the AV voting system through a referendum, while the Conservative Party was seeking to address what it wrongly considered to be a bias against it in the system. My party failed to persuade people to vote for its preferred option in that referendum, and the Conservative Party failed to persuade either House of Parliament to accept the proposals for new constituency boundaries in 2013 and knew it would fail again with those of 2018—so the 2011 Act must be replaced. But to say that this Bill has been approved by the other place means only that it has been approved by the Conservative Party.
The Bill before us is better than that of 2011 in that it retains 650 constituencies and proposes reviews every eight years, not every five, but the basis of it remains flawed in at least two major respects. First, we still have a hopelessly inadequate system of voter registration, which provides the building blocks for drawing boundaries. Secondly, as we can see from the last two aborted review processes, the tiny variation of just 5% permitted to the quota for electorates in each constituency will prevent the creation of sensible constituencies based on recognised communities and will result in major disruption to many constituency boundaries with every review.
In 2015 the Political and Constitutional Reform Select Committee concluded that a variation of 7.5% or 8% would be consistent with the government aims and with avoiding these problems. We see from the 2013 and 2018 proposals how this inflexible figure of 5% results in great changes to many constituencies even though both sets of proposals were for the same number of seats. It was argued in the other place that splitting local government wards could limit this disruption, but an excellent and detailed note from the Boundary Commission for England explained very carefully and in detail why splitting wards is not practical on a widespread basis. This time we must properly address the problem of being unable to create sensible constituencies all within the 5% quota and which will otherwise often cross county and other local government boundaries and involve major disruption to boundaries, splitting up many constituencies every time a review is conducted.