On Monday Livingstone addressed an audience of Green party members and was questioned about his record and policies for a new term.
Members then voted on whether to recommend supporters give him their second preference votes. The Greens say “a clear majority” voted in favour of doing so.
“The voting system gives Londoners a chance to make a positive Mayoral first choice for a more equal, healthier and affordable London,” said Green Party Mayoral candidate Jenny Jones.
“However, should I not be counted among the top two candidates after the first round, then I want a Mayor who will work with Green Party Assembly Members to deliver on pay equality, less pollution and cheaper fares.”
During the Q&A with Green members, Livingstone was questioned about “concerns” over his record “on road building, the poorly regulated financial sector and air pollution.”
Jones added: “Ken Livingstone is far from perfect, but we know from his last time as Mayor that we can work with him to make positive changes in a way that would be impossible with either Boris Johnson or many other senior Labour politicians.”
Describing the endorsement as “a key building block to winning change on May 3rd”, Mr Livingstone said: “I look forward to working again with Green Assembly Members, including tackling air pollution, creating a fairer London, and improving pedestrian and cyclists’ safety.”
Livingstone has previously said he would appoint Jones as an advisor “on cycling and walking policy” if elected in May.
Londoners elect a new Mayor and London Assembly on May 3rd.
Candidates for Mayor include Brian Paddick (Liberal Democrat), Jenny Jones (Green party), Ken Livingstone (Labour), Lawrence Webb (UKIP) and Boris Johnson (Conservative).
