FACTBOX-Round-up of mayoral polls

LONDON (Reuters) - Conservative Boris Johnson, Labour's Ken Livingstone and Liberal Democrat Brian Paddick are the frontrunners in the race to become the new mayor of London.

Here are the results of the main polls:

- April 21, Mruk Cello/Sunday Times

Livingstone 45

Johnson 44

Paddick 9

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- April 14, YouGov/Evening Standard

Johnson 45