Mr Cameron, having granted the referendum in
the post-election coalition talks, would have a lot of explaining to do to his restive backbenchers.
The speculation was as detailed as it was impossible to confirm: exploratory
talks had already been had with Nick Clegg over the possibility of a
post-election deal; Clegg had delivered what the plotters wanted to hear: he could work with Labour, but not with Brown; in the event that Labour came third in the poll of votes, but with enough seats to form a
coalition government and keep the Tories out, Brown would have to go — and quickly.