If the Lib Dems are ever to get proportional representation, they need to demonstrate that coalitions can work in practice, argues Mark Thompson. The Tories' offer provides them with their best chance to do so.
Paul Waugh reports on Andy Burnham's remarkable decision to oppose a Lib-Lab coalition publicly and support David Blunkett's position.
Remember David Cameron's "cast-iron guarantee" of a referendum on the Lisbon Treaty? Iain Martin wonders whether the sane guarantee applies to a referendum on electoral reform.
John Rentoul says that we can expect more Blair-Brown revelations as Campbell prepares the unexpurgated version of his diaries.
At the Guardian, Jon Henley explains why we're seeing so much of Paddy Ashdown, David Steel, John Major et al.