There is no need. The next General Election is more or less already played out: LibDems will go back to single-digit and lose tons of MPs; Tories will hold at best, and at worst lose tons of MPs because of UKIP splitting their votes in Midlands and home counties; Labour will pick up enough votes to get a thin parliamentary majority, despite a wobbly leadership. This cock-up might increase the Labour margins by one or two points, that’s about it.
(Assuming Scotland will still send representatives to Westminster. If they’re entirely out by 2015 already – unlikely, but you never know – then the Tories will have a guaranteed majority from here to the end of the world.)