Tory leader David Cameron and Liberal Democrat leader Nick Clegg have held face-to-face talks as they continue their attempts to thrash out a power-sharing deal.
A senior Conservative Party spokeswoman said the talks at Admirality House in Whitehall were "constructive and amicable".
The first face-to-face talks between the leaders since Thursday's General Election came after Mr Clegg secured his party's endorsement to enter talks with the Conservatives over possible co-operation in forming a new government.
Mr Clegg held three separate meetings with all his 57 MPs on Saturday and the party says each one gave their "full and complete" backing to the leader's approach.
Formal negotiations between representatives of the two parties resume on Sunday at 11am. The talks will bring together the Tory team of George Osborne, William Hague, Oliver Letwin and Mr Cameron's chief of staff, Ed Llewellyn, with Lib Dem negotiators David Laws, Chris Huhne, Danny Alexander and Andrew Stunell for the second time, following initial talks on Friday evening.
Saturday's meetings took place as noisy protests ufolded outside by campaigners calling for electoral reform.
Hundreds of people turned out chanting, with placards. They are calling for the Liberal Democrats to use their power in current negotiations towards a coalition government to push for what they call a fairer system of proportional representation.