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The Mayor's confirmed his share of Londoner's Council tax is to be cut for the first time.
He's secured 90 million pounds from government - which means he can reduce it by one percent this year.
The tax which has been frozen each year since Boris came to power is expected be a key part of his pitch for re-election.
His campaign team hope the move will help him compete with his rival Ken Livingstone's promise of a reduction in transport fares.