Without hindsight
2005: Arthur Scargill (Socialist Labour)
2010: David Cameron (Conservative)
2015: David Cameron (Conservative)
whaaaaaaaaaa
"Cameron might have been a psychopathic Eton boy who turned the economy into a benefits system for his rich mates, introduced a socially and economically damaging austerity system and put his own ego and the wellbeing of his party above the country resulting in what could potentially end up being the worst crisis in its history, but Brown and Milliband were neoliberal red Tories!"
If you are going to vote for a Tory no matter what, you might as well cut the middle man /s