The Lords was expected to debate an amendment to the Electoral Registration and Administration Bill last week.

BBC: Lords clashes over delaying of boundary changes vote

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

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