
British Prime Minister Gordon Brown delivers a speech at Westminster Academy school in London, Britain 25 April 2010 as the ruling Labour Party launched their Green manifesto. Meanwhile Liberal Democrat leader Nick Clegg has said It would be "preposterous" for Labour to have its leader remain in Number 10 if it came third in terms of votes. He told the BBC, 25 April, it was "potty" Labour could get fewer votes than other parties but still be the biggest party. EPA/ANDY RAIN

British Prime Minister Gordon Brown is pictured with his wife Sarah at Westminster Academy school in London, Britain 25 April 2010. The Labour Party launched their Green manifesto 25 April. Meanwhile Liberal Democrat leader Nick Clegg has said It would be "preposterous" for Labour to have its leader remain in Number 10 if it came third in terms of votes. He told the BBC, 25 April, it was "potty" Labour could get fewer votes than other parties but still be the biggest party. EPA/ANDY RAIN

British Prime Minister Gordon Brown delivers a speech at Westminster Academy school in London, Britain 25 April 2010 as the ruling Labour Party launched their Green manifesto. Meanwhile Liberal Democrat leader Nick Clegg has said It would be "preposterous" for Labour to have its leader remain in Number 10 if it came third in terms of votes. He told the BBC, 25 April, it was "potty" Labour could get fewer votes than other parties but still be the biggest party. EPA/ANDY RAIN

British Prime Minister Gordon Brown delivers a speech at Westminster Academy school in London, Britain 25 April 2010 as the ruling Labour Party launched their Green manifesto. Meanwhile Liberal Democrat leader Nick Clegg has said It would be "preposterous" for Labour to have its leader remain in Number 10 if it came third in terms of votes. He told the BBC, 25 April, it was "potty" Labour could get fewer votes than other parties but still be the biggest party. EPA/ANDY RAIN

British Prime Minister Gordon Brown and his wife Sarah greeted on arrival at Westminster Academy school in London, Britain 25 April 2010 as the ruling Labour Party launched their Green manifesto. Meanwhile Liberal Democrat leader Nick Clegg has said It would be "preposterous" for Labour to have its leader remain in Number 10 if it came third in terms of votes. He told the BBC, 25 April, it was "potty" Labour could get fewer votes than other parties but still be the biggest party. EPA/ANDY RAIN

British Prime Minister Gordon Brown is with his wife Sarah on arrival at Westminster Academy school in London, 25 April 2010 as the ruling Labour Party launched their Green manifesto 25 April. Meanwhile Liberal Democrat leader Nick Clegg has said It would be "preposterous" for Labour to have its leader remain in Number 10 if it came third in terms of votes. He told the BBC, 25 April, it was "potty" Labour could get fewer votes than other parties but still be the biggest party. EPA/ANDY RAIN

British Prime Minister Gordon Brown with his wife Sarah at Westminster Academy school in London 25 April 2010 as the ruling Labour Party launched their Green manifesto. Meanwhile Liberal Democrat leader Nick Clegg has said It would be "preposterous" for Labour to have its leader remain in Number 10 if it came third in terms of votes. He told the BBC, 25 April, it was "potty" Labour could get fewer votes than other parties but still be the biggest party. EPA/ANDY RAIN