The vote is on a Lords amendment to the Electoral Registration and Administration Bill, postponing the boundary changes needed to reduce the number of MPs to 600 and equalise constituency electorates.
BBC: Reading the signs
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Mr Clegg defended the actions of Lib Dem peers, including ministers, who joined with Labour to pass an amendment to the Electoral Registration and Administration Bill to postpone the boundary review to 2018 at the earliest.
BBC: Nick Clegg
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Although the Boundary Commission, a politically neutral public body in charge of electoral districts, tries to ensure that constituencies are redrawn to reflect demographic changes, in practice, it can't keep up.