Livingstone’s campaign announced Duvall’s support on Friday as the former Mayor visited Barking to campaign with a local by election candidate.
Duvall’s support means Livingstone has secured the backing of 6 of Labour’s 8 London Assembly Members.
Confirming his support Duvall said: “Ken Livingstone has rightly put standing up for London, our economy, jobs and housing at the centre of his campaign. As a politician elected to work for Londoners it is clear to me that Ken is working to win support across London, not relying on support from outside London.”
In comments likely to be seen as a swipe at Livingstone’s challenger Oona King, Duvall said the party needed “a candidate who really understands the role of the Mayor, is a tough negotiator and who will stand up for London.”
Welcoming his former colleague’s support Livingstone said: “His backing gives huge momentum to a campaign that is focused on getting London on the right track in the face of higher fares, police cuts, axed transport links and broken promises.”
