There is no guarantee that the Lib Dems will vote down the planned boundary changes in retaliation for the abandonment of House of Lords reform. Contrary to what some claim, no link was made between the policies in the coalition agreement (the AV referendum was the quid pro quo for the boundary changes) and Nick Clegg has previously told MPs that “there can be no justification for maintaining the current inequality between constituencies and voters across the country.” This is a powerful position from which to argue that the Lib Dems should not renege on the agreement.
If, however, Clegg vetoes the bill, the final version of which is not due to reach parliament until 2013, who benefits? The most obvious answer is Labour. Without the boundary changes, Miliband’s party only needs a lead of three points (on a uniform swing) to win a majority, compared with one of four points under the new constituencies. Conversely, the Tories, who would need a lead of seven points with the changes, would need a lead of 11 points without them.