50 fewer MPs: Challenges for the constituency boundary review

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Work on the parliamentary constituency boundary review is set to begin next March. At a seminar jointly organised by The Constitution Unit and the House of Commons Library on October 27 Tony Bellringer, the Secretary to the Boundary Commission for England, outlined the boundary review process and Ron Johnston spoke about some of the challenges likely to be faced. Daniel Goldstein and Matthew Rice provide an overview.

As a result of the Parliamentary Voting System and Constituencies Act of 2011 a review of parliamentary constituency boundaries is now required to occur every five years.  After the first of these was abandoned in 2013, following an amendment to what became the Electoral Registration and Administration Act , the first official revised review is scheduled for completion in 2018. On October 27 the Secretary to the Boundary Commission for England, Tony Bellringer, and the foremost academic expert on constituency reviews, Professor Ron Johnston, came to Parliament to discuss the process and implications of the review at an event jointly organised by The Constitution Unit and the House of Commons Library’s Parliament and Constitution Centre.

Law and process

Tony Bellringer began by explaining how the constituency review process has changed since the 2011 law.  Prior to 2011, a review occurred every eight to 12 years.  While preserving constituency stability, this timetable permitted the size of the electorate in each constituency to vary significantly over time.  One advantage of that structure was that it allowed the Boundary Commission for England (BCE) to work over time across the country with a small, experienced staff.  Reviews are now regularly scheduled for every five years.  This better mitigates drift but carries the cost of more frequent constituency change.  Further, interim reviews are now prohibited, compressing work into the two-and-a-half years prior to a review deadline.  This presents budgeting as well as staff retention issues for the BCE.

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