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'.

Any party arrangement for governing Britain must involve a referendum on PR, and Nick Clegg should not be seduced by the trappings of power, says new Green MP Caroline Lucas.

If the churches want democracy renewed, a broader political agenda and a voice for the voiceless, says Jonathan Bartley, they must make the case for PR and they must do it right now.

Liberal Democrat leader Nick Clegg has challenged the Conservative Party, which has the largest share of the public vote, to come up with a proposal "to govern in the national interest".