Britain's Chancellor of the Exchequer Alistair Darling leaves the Treasury to go to Parliament to deliver his pre-budget report, London December 9, 2009. Darling will on Wednesday set the stage for the coming election and gamble his government's future on a one-off tax on bank bonuses and promises to protect schools, hospitals and policing. REUTERS/Suzanne Plunkett (BRITAIN - Tags: BUSINESS POLITICS)