In 1933, a certain party just failed to win an overall majority, polling 43.9 percent of the vote. To take power, therefore, it too formed a coalition government.
Once in power, of course, it passed the Enabling Act aimed at keeping the ruling party in power. Today, we have the "enhanced majority" requirement, the Cleggerons' own version of the Enabling Act, to prevent them from being deposed. With 55 percent of MPs required to vote for a dissolution of parliament, they will have the ideal mechanism in place.
Gordon Brown must be kicking himself. If only he'd thought of it, he could still be in No 10.