(01 of18)
Open Image ModalLONDON, ENGLAND - APRIL 27: Prime Minister David Cameron wipes away some sweat as he speaks to business leaders on April 27, 2015 in London, England. Mr Cameron has started the fifth week of the general election campaign with a passionate speech in the heart of the City of London financial district. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
(02 of18)
Open Image ModalLONDON, ENGLAND - APRIL 27: Prime Minister David Cameron speaks to business leaders on April 27, 2015 in London, England. Mr Cameron has started the fifth week of the general election campaign with a passionate speech in the heart of the City of London financial district. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
(03 of18)
Open Image ModalLONDON, ENGLAND - APRIL 27: Prime Minister David Cameron speaks to business leaders on April 27, 2015 in London, England. Mr Cameron has started the fifth week of the general election campaign with a passionate speech in the heart of the City of London financial district. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
(04 of18)
Open Image ModalLONDON, ENGLAND - APRIL 27: Prime Minister David Cameron walks from the stage after addressing business leaders on April 27, 2015 in London, England. Mr Cameron has started the fifth week of the general election campaign with a passionate speech in the heart of the City of London financial district. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
(05 of18)
Open Image ModalLONDON, ENGLAND - APRIL 27: Prime Minister David Cameron addresses business leaders on April 27, 2015 in London, England. Mr Cameron has started the fifth week of the general election campaign with a passionate speech in the heart of the City of London financial district. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
(06 of18)
Open Image ModalLONDON, ENGLAND - APRIL 27: Prime Minister David Cameron speaks to business leaders on April 27, 2015 in London, England. Mr Cameron has started the fifth week of the general election campaign with a passionate speech in the heart of the City of London financial district. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
(07 of18)
Open Image ModalLONDON, ENGLAND - APRIL 27: Prime Minister David Cameron addresses business leaders on April 27, 2015 in London, England. Mr Cameron has started the fifth week of the general election campaign with a passionate speech in the heart of the City of London financial district. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
(08 of18)
Open Image ModalLONDON, ENGLAND - APRIL 27: Prime Minister David Cameron speaks to business leaders on April 27, 2015 in London, England. Mr Cameron has started the fifth week of the general election campaign with a passionate speech in the heart of the City of London financial district. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
(09 of18)
Open Image ModalLONDON, ENGLAND - APRIL 27: Prime Minister David Cameron speaks to business leaders on April 27, 2015 in London, England. Mr Cameron has started the fifth week of the general election campaign with a passionate speech in the heart of the City of London financial district. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
(10 of18)
Open Image ModalLONDON, ENGLAND - APRIL 27: A audience member takes an iPad photo as Prime Minister David Cameron speaks to business leaders on April 27, 2015 in London, England. Mr Cameron has started the fifth week of the general election campaign with a passionate speech in the heart of the City of London financial district. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
(11 of18)
Open Image ModalLONDON, ENGLAND - APRIL 27: Prime Minister David Cameron speaks to business leaders on April 27, 2015 in London, England. Mr Cameron has started the fifth week of the general election campaign with a passionate speech in the heart of the City of London financial district. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
(12 of18)
Open Image ModalLONDON, ENGLAND - APRIL 27: Prime Minister David Cameron waits in the audience before speaking to business leaders on April 27, 2015 in London, England. Mr Cameron has started the fifth week of the general election campaign with a passionate speech in the heart of the City of London financial district. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
(13 of18)
Open Image ModalLONDON, ENGLAND - APRIL 27: Prime Minister David Cameron speaks to business leaders on April 27, 2015 in London, England. Mr Cameron has started the fifth week of the general election campaign with a passionate speech in the heart of the City of London financial district. (Photo by Peter Macdiarmid/Getty Images) (credit:Peter Macdiarmid via Getty Images)
(14 of18)
Open Image ModalPrime Minister David Cameron giving a speech about the economy at the Institute of Chartered Accountants in Moorgate, London. (credit:Chris Radburn/PA Wire)
(15 of18)
Open Image ModalPrime Minister David Cameron giving a speech about the economy at the Institute of Chartered Accountants in Moorgate, London. (credit:Chris Radburn/PA Wire)
(16 of18)
Open Image ModalPrime Minister David Cameron giving a speech about the economy at the Institute of Chartered Accountants in Moorgate, London. (credit:Chris Radburn/PA Wire)
(17 of18)
Open Image ModalPrime Minister David Cameron giving a speech about the economy at the Institute of Chartered Accountants in Moorgate, London. (credit:Chris Radburn/PA Wire)
(18 of18)
Open Image ModalPrime Minister David Cameron arrives at the Institute of Chartered Accountants in Moorgate, London to give a speech about the economy. (credit:Chris Radburn/PA Wire)