Supporters of voting reform joined demonstrations across Britain yesterday to call for proportional representation. They included around 1,000 people who rallied outside Parliament.

Hundreds of people gathered outside a meeting of Liberal Democrats this evening to urge them not to dilute their commitment to electoral reform as they attempt to form a power-sharing government.

Liberal Democrat leader Nick Clegg, who is in discussions with the Tories' David Cameron over forming a government, has been told firmly that there must be 'no sell out over PR'.