A barrister, a councillor and ex-deputy assistant police commissioner are to compete to become the Liberal Democrats' candidate for London mayor.
Brian Paddick took early retirement from the force in May
Brian Paddick, one of London's most controversial former police chiefs, is up against barrister Chamali Fernando and Haringey councillor Fiyaz Mughal.
Lib Dem members in London will vote on the trio next month. The successful candidate will be named in November.
Ed Davey, the party's campaigns' chair, said each would make "a great mayor".
All three will take part in hustings at the Liberal Democrats autumn conference in Brighton next week in a bid to win the party's nomination for the 2008 mayoral election.
Mr Paddick, who last week announced his plans to enter the race to challenge Ken Livingstone, says he will introduce "a series of radical and innovative policies that will help all Londoners to feel part of and to be proud of their capital city.
The 49-year-old, was the highest ranking openly gay officer in the Metropolitan Police.
He is best known for introducing a softly-softly approach to cannabis when he was a commander in Lambeth.
Ms Fernando is a barrister from Finchley, who says she plans to put forward issues, ask tough questions and campaign across London.
She wants to present Liberal Democracy "as the tonic for Londoners from all walks of life".
Mr Mughal, chief executive of Enfield Citizens Advice Bureau, was the party's deputy president in 2006-7.
He says that on election he will reduce and devolve urban planning powers to local authorities, push for further integration schemes for migrant communities and develop transparent recruiting procedures for mayoral advisers.
Commenting on the nominees, Mr Davey said: "This is an excellent shortlist of high calibre candidates that will both give London Liberal Democrat members a real choice and the people of the capital a great mayor."
Current London Mayor Ken Livingstone is to stand for Labour in next year's election. The Conservatives have yet to choose their candidate - the four shortlisted hopefuls take part in hustings this week.
Other confirmed candidates are Sian Berry for the Green Party and Big Issue founder John Bird.