Nick Clegg

Britain's Deputy Prime Minister Nick Clegg gestures as he speaks at the CBI annual conference in London...Britain's Deputy Prime Minister Nick Clegg gestures as he speaks at the Confederation of British Industry (CBI) annual conference in London November 10, 2014. REUTERS/Suzanne Plunkett (BRITAIN - Tags: POLITICS BUSINESS)

Suzanne Plunkett/Reuters

Britain’s Deputy Prime Minister Nick Clegg gestures as he speaks at the Confederation of British Industry (CBI) annual conference in London.

Leader of the Liberal Democrats, Nick Clegg, says farewell to the Democrat conference in Glasgow.

Charlie Bibby/FT

Leader of the Liberal Democrats, Nick Clegg, says farewell to the conference in Glasgow.

Leader of the Liberal Democrats, Nick Clegg with Business Secretary, Vince Cable in the audience prior to Vince  Cable making his keynote speech at the Liberal Democrat party conference in Glasgow.

Charlie Bibby/FT

Leader of the Liberal Democrats, Nick Clegg with Business Secretary, Vince Cable in the audience prior to Vince Cable making his keynote speech at the Liberal Democrat party conference in Glasgow.

Delegates browse the Liberal Democrat merchandise stand at the Liberal Democrat conference in Glasgow this morning.

Charlie Bibby/FT

Liberal Democrat merchandise on sale at the Lib Dem conference in Glasgow on Monday 

Liberal Democrats Autumn Conference, Glasgow. Leader of the Lib Dems and Deputy Prime Minister, Nick Clegg, arrives at the conference hall ahead of his keynote speech this afternoon.

Charlie Bibby/FT

Nick Clegg, leader of the Liberal Democrats and deputy prime minister, arrives at the conference hall ahead of his keynote speech to delegates at the end of the Liberal Democrat Autumn Party conference in Glasgow 

The Liberal Democrats Hold Their Annual Party Conference...GLASGOW, SCOTLAND - SEPTEMBER 16:  Britain's Deputy Prime Minister and Liberal Democrats party leader Nick Clegg speaks during a question and answer session at the Scottish Exhibition and Conference Centre (SECC) on September 16, 2013 in Glasgow, Scotland. Nick Clegg has denied any suggestions of a rift between him and his Cabinet colleague Business secretary Vince Cable over the Liberal Democrats future economic policy.  (Photo by Dan Kitwood/Getty Images)

Dan Kitwood/Getty

Nick Clegg, Britain’s deputy prime minister, speaks during a question and answer session at the Liberal Democrat party conference in Glasgow, Scotland on Monday. Mr Clegg has denied any suggestions of a rift between him and Vince Cable, the business secretary, over the Liberal Democrats future economic policy.