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Vince Cable, U.K. business secretary, leaves 10 Downing Street following a pre-budget cabinet meeting in London, U.K., on Wednesday, March 18, 2015. While Chancellor George Osborne has pledged 'no giveaways' in today's budget announcement, speculation is mounting that he will use his last fiscal event before the May 7 general election to seek support for his Conservative Party, which is running neck and neck with the Labour opposition in opinion polls. Photographer: Chris Ratcliffe/Bloomberg via Getty Images

Vince Cable, U.K. business secretary, leaves 10 Downing Street following a pre-budget cabinet meeting in London, U.K., on Wednesday, March 18, 2015. While Chancellor George Osborne has pledged 'no giveaways' in today's budget announcement, speculation is mounting that he will use his last fiscal event before the May 7 general election to seek support for his Conservative Party, which is running neck and neck with the Labour opposition in opinion polls. Photographer: Chris Ratcliffe/Bloomberg via Getty Images