British Deputy Prime Minister Nick Clegg

British Deputy Prime Minister Nick Clegg leaves after giving evidence at the Leveson Inquiry into media ethics at the High Court in London, on June 13, 2012. 'The idea that politicians and the press should operate in hermetically sealed silos is completely unrealistic,' he told the Inquiry Wednesday. AFP PHOTO / CARL COURT (Photo credit should read CARL COURT/AFP/GettyImages)

Team GB Arrive In Olympic Village

LONDON, ENGLAND - JULY 24: Dame Kelly Holmes (L), Duncan Goodhew (2L) and British Deputy Prime Minister Nick Clegg (R) watch on as Team GB arrive in the Olympic Village on July 24, 2012 in London, England. (Photo by Jeff J Mitchell/Getty Images)

Britain's Deputy Prime Minister Nick Clegg during a press conference in central where he announced that the government will abandon plans to overhaul the 700-year-old House of Lords amid resistance from both his coalition colleagues and the opposition Labour Party Monday Aug. 6. 2012. (AP Photo/Stefan Rousseau/PA) UNITED KINGDOM OUT NO SALES NO ARCHIVE

Leader Of The Liberal Democrats Nick Clegg Visits Manufacturing And Recycling Firm Mainetti's UK Headquarters

JEDBURGH, SCOTLAND - AUGUST 28: Nick Clegg, Deputy Prime Minister and leader of the Liberal Democrats, visits manufacturer and recycler Mainetti UK on August 28, 2012 in Jedburgh,Scotland. Nick Clegg visited Mainetti UK HQ today to discuss manufacturing, recycling and workforce training. He met with Mainetti UK's senior management team and employees during a tour of the factory. (Photo by Jeff J Mitchell/Getty Images)

Leader Of The Liberal Democrats Nick Clegg Visits Manufacturing And Recycling Firm Mainetti's UK Headquarters

JEDBURGH, SCOTLAND - AUGUST 28: Nick Clegg, Deputy Prime Minister and leader of the Liberal Democrats, visits manufacturer and recycler Mainetti UK on August 28, 2012 in Jedburgh,Scotland. Nick Clegg visited Mainetti UK HQ today to discuss manufacturing, recycling and workforce training. He met with Mainetti UK's senior management team and employees during a tour of the factory. (Photo by Jeff J Mitchell/Getty Images)

BRITAIN-POLITICS

British Prime Minister David Cameron (L) walks with Deputy Prime Minister Nick Clegg through the Aldermere Housing Development on September 6, 2012, in Cheshunt, north of London. AFP PHOTO / PETER MACDIARMID/POOL (Photo credit should read PETER MACDIARMID/AFP/GettyImages)

2012 London Paralympics - Closing Ceremony

LONDON, ENGLAND - SEPTEMBER 09: Prime Minister David Cameron (L) and Deputy Prime Minister Nick Clegg look on at the Olympic Stadium during the closing ceremony of the 2012 London Paralympic Games, on September 09, 2012 in London, England. (Photo by Stefan Rousseau - WPA Pool/Getty Images)

Clegg 'bigot' comment withdrawn

File photo dated 17/8/2012 of Nick Clegg who has been embarrassingly forced to withdraw comments in which he branded opponents of gay marriage "bigots".

Clegg tuition fees apology

File photo dated 5/6/2012 of Nick Clegg, who looked to see off any threat to his leadership as he apologised for breaking a Liberal Democrat election promise to oppose any increase in university tuition fees.