LONDON - APRIL 29: In this handout image provided by the BBC, Conservative Party leader David Cameron (L) Liberal Democrat leader Nick Clegg (C) and Prime Minister Gordon Brown debate during the third and final leader's debate at the University of Birmingham on April 29, 2010 in Birmingham, England. The debate is focusing on the economy ahead of next week's general election which is set to be one of the most closely fought political contests in recent times. (Photo by Jeff Overs/BBC via Getty Images)
