British Election: Labour and Tory efforts may fail to avoid revote

The Tories are attempting to brand Ed Miliband as a confidence trickster set to “hijack” Downing St even if he does not get the biggest block of seats in a hung House of Commons, while Labour has struck back by insisting David Cameron will be little more than a house invader if he attempts to cling to the official residence with no hope of putting together a parliamentary majority.
There is no point checking with the British constitution over what happens when no one can command a majority — because there is no written constitution.