It’s a disaster, a cataclysm, a wipeout. Half the cabinet will lose their seats, and Labour will be in power for a decade. All those things will be true if the BBC exit poll is anything close to reflecting reality – but hang on a minute. At the risk of sounding like one of those football managers insisting that ‘there are positives to take out of this’ after a five-nil defeat, isn’t there reason for the Tories to feel a bit of relief here? Talk of the Lib Dems overtaking the Conservatives to become His Majesty’s Opposition seems to be...