Theresa May smiles as she arrives in Downing Street for the first time as Prime Minister. July 13, 2016. London.
       
     
Prime Minister David Cameron appears to float from number 10 Downing Street as he leaves for Parliament. July 6, 2016. London.
       
     
Prime Minister David Cameron walks with pro-democracy leader Aung San Suu Kyi in her garden. Yangon, Myanmar. April 2012.
       
     
Prime Minister Gordon Brown talks to students at Prendergast Hilly Fields School. London, England. May 2009.
       
     
Prime Minister Gordon Brown and his wife Sarah (L) visit a health centre during the general election. Yeadon near Leeds, England. April 2010.
       
     
United Kingdom Independence Party (UKIP) leader Nigel Farage takes a cigarette break as he campaigns in the general election. Winslow, England. April 2010.
       
     
British National Party Leader Nick Griifin receives a direct hit from a protestor's egg near Parliament. London, England. June 2009.
       
     
London Mayor Boris Johnson stands near City Hall. London, England. July 2009.
       
     
Chancellor of the Exchequer Alistair Darling holds up his red box on Budget Day in Downing Street. London, England. April 2009.
       
     
Senator Barack Obama (R) meets with Prime Minister Gordon Brown in the garden at Downing Street. London, England. July 2008.
       
     
Liberal Democrat leadership challenger Nick Clegg waits backstage before speaking to supporters at the Liberal Club. London, England. October 2007.
       
     
Prime Minister Tony Blair (L) meets with Colonel Gaddafi in his tent near Sirte, Libya. May 2007.
       
     
Conservative activists wear masks depicting Chancellor Gordon Brown on Budget day. London, England. March 2007.
       
     
Newly elected leader of the Conservative Party David Cameron kisses his wife Samantha after giving his acceptance speech. London, England. December 2005.
       
     
Prime Minister Tony Blair (R) attends a general election poster launch with Chancellor Gordon Brown. London, England. April 2005.
       
     
Dr Ian Paisley speaks to reporters at DUP Headquarters Belfast, Northern Ireland. November 2003.
       
     
Conservative Party Leader Iain Duncan Smith stands in the Shadow Cabinet room in Parliament. London, England. Janurary 2003.
       
     
Politician George Galloway speaks at a meeting. London, England. April 2003.
       
     
Deputy Prime Minister John Prescott walks between two Jaguar cars. London, England. October 2002.
       
     
Home Secretary Jack Straw visits Wandsworth Prison's drug testing suite. London, England. October 2000.
       
     
New Mayor Ken Livingstone is rescued by police during a walkabout. London, England. May 2000.
       
     
Prime Minister Tony Blair has his microphone adjusted by Mo Mowlem during a meeting at Hammersmith Town Hall. London, England. July 2000.
       
     
Conservative Party Leader William Hague sits in the cockpit of a helicopter at the Farnborough Air Show. Hampshire, England. September 1998.
       
     
Prime Minister John Major speaks from a soap box on his first day of campaigning in the general election. Luton, England. March 1997.
       
     
MP Neil Hamilton (right) meets his opponent, former BBC war correspondent Martin Bell (left), on Knutsford Heath during the general election. Cheshire, England. April 1997.
       
     
Labour Party Leader Tony Blair writes a speech in the garden of his Islington house. London, England. June 1996.
       
     
Shadow Chancellor of the Exchequer Gordon Brown waits to speak at a press conference on tax. London, England. September 1993.
       
     
Labour Party leader John Smith stands in his office at the House of Commons. London, England. July 1992.
       
     
Conservative politician Michael Heseltine, President of the Board of Trade, leaves Number 10 Downing Street after attending a Cabinet meeting. London, England. April 1992.
       
     
Conservative politician Michael Heseltine stands with his wife Anne as he announces his candidacy for the leadership of the Party, outside his house in Belgravia, London, England. November 1990.
       
     
Labour leader Neil Kinnock (L) walks with Peter Mandelson to a Labour Party meeting. London, England. July 1990.
       
     
Soviet President Mikhail Gorbachev (centre) stands with other dignataries after attending the Conference on Security and Co-operation in Europe Summit. Paris, France. November 1990.
       
     
Ken Clarke stands in his office on his first day as Secretary of State for Education. London, England. November 1990.
       
     
Prime Minister Margaret Thatcher attends the Blackfriars Foundry the day after Nigel Lawson resigned as Chancellor of the Exchequer. London, England. October 1989.
       
     
Labour Party Leader Neil Kinnock (L) with Polish Solidarity Leader Lech Walesa at Parliament. November 1989.
       
     
Sir Cyril Smith MP tests the first automatic ticket barriers on the Underground. London, England. June 1989.
       
     
Theresa May smiles as she arrives in Downing Street for the first time as Prime Minister. July 13, 2016. London.
       
     
Theresa May smiles as she arrives in Downing Street for the first time as Prime Minister. July 13, 2016. London.
Prime Minister David Cameron appears to float from number 10 Downing Street as he leaves for Parliament. July 6, 2016. London.
       
     
Prime Minister David Cameron appears to float from number 10 Downing Street as he leaves for Parliament. July 6, 2016. London.
Prime Minister David Cameron walks with pro-democracy leader Aung San Suu Kyi in her garden. Yangon, Myanmar. April 2012.
       
     
Prime Minister David Cameron walks with pro-democracy leader Aung San Suu Kyi in her garden. Yangon, Myanmar. April 2012.
Prime Minister Gordon Brown talks to students at Prendergast Hilly Fields School. London, England. May 2009.
       
     
Prime Minister Gordon Brown talks to students at Prendergast Hilly Fields School. London, England. May 2009.
Prime Minister Gordon Brown and his wife Sarah (L) visit a health centre during the general election. Yeadon near Leeds, England. April 2010.
       
     
Prime Minister Gordon Brown and his wife Sarah (L) visit a health centre during the general election. Yeadon near Leeds, England. April 2010.
United Kingdom Independence Party (UKIP) leader Nigel Farage takes a cigarette break as he campaigns in the general election. Winslow, England. April 2010.
       
     
United Kingdom Independence Party (UKIP) leader Nigel Farage takes a cigarette break as he campaigns in the general election. Winslow, England. April 2010.
British National Party Leader Nick Griifin receives a direct hit from a protestor's egg near Parliament. London, England. June 2009.
       
     
British National Party Leader Nick Griifin receives a direct hit from a protestor's egg near Parliament. London, England. June 2009.
London Mayor Boris Johnson stands near City Hall. London, England. July 2009.
       
     
London Mayor Boris Johnson stands near City Hall. London, England. July 2009.
Chancellor of the Exchequer Alistair Darling holds up his red box on Budget Day in Downing Street. London, England. April 2009.
       
     
Chancellor of the Exchequer Alistair Darling holds up his red box on Budget Day in Downing Street. London, England. April 2009.
Senator Barack Obama (R) meets with Prime Minister Gordon Brown in the garden at Downing Street. London, England. July 2008.
       
     
Senator Barack Obama (R) meets with Prime Minister Gordon Brown in the garden at Downing Street. London, England. July 2008.
Liberal Democrat leadership challenger Nick Clegg waits backstage before speaking to supporters at the Liberal Club. London, England. October 2007.
       
     
Liberal Democrat leadership challenger Nick Clegg waits backstage before speaking to supporters at the Liberal Club. London, England. October 2007.
Prime Minister Tony Blair (L) meets with Colonel Gaddafi in his tent near Sirte, Libya. May 2007.
       
     
Prime Minister Tony Blair (L) meets with Colonel Gaddafi in his tent near Sirte, Libya. May 2007.
Conservative activists wear masks depicting Chancellor Gordon Brown on Budget day. London, England. March 2007.
       
     
Conservative activists wear masks depicting Chancellor Gordon Brown on Budget day. London, England. March 2007.
Newly elected leader of the Conservative Party David Cameron kisses his wife Samantha after giving his acceptance speech. London, England. December 2005.
       
     
Newly elected leader of the Conservative Party David Cameron kisses his wife Samantha after giving his acceptance speech. London, England. December 2005.
Prime Minister Tony Blair (R) attends a general election poster launch with Chancellor Gordon Brown. London, England. April 2005.
       
     
Prime Minister Tony Blair (R) attends a general election poster launch with Chancellor Gordon Brown. London, England. April 2005.
Dr Ian Paisley speaks to reporters at DUP Headquarters Belfast, Northern Ireland. November 2003.
       
     
Dr Ian Paisley speaks to reporters at DUP Headquarters Belfast, Northern Ireland. November 2003.
Conservative Party Leader Iain Duncan Smith stands in the Shadow Cabinet room in Parliament. London, England. Janurary 2003.
       
     
Conservative Party Leader Iain Duncan Smith stands in the Shadow Cabinet room in Parliament. London, England. Janurary 2003.
Politician George Galloway speaks at a meeting. London, England. April 2003.
       
     
Politician George Galloway speaks at a meeting. London, England. April 2003.
Deputy Prime Minister John Prescott walks between two Jaguar cars. London, England. October 2002.
       
     
Deputy Prime Minister John Prescott walks between two Jaguar cars. London, England. October 2002.
Home Secretary Jack Straw visits Wandsworth Prison's drug testing suite. London, England. October 2000.
       
     
Home Secretary Jack Straw visits Wandsworth Prison's drug testing suite. London, England. October 2000.
New Mayor Ken Livingstone is rescued by police during a walkabout. London, England. May 2000.
       
     
New Mayor Ken Livingstone is rescued by police during a walkabout. London, England. May 2000.
Prime Minister Tony Blair has his microphone adjusted by Mo Mowlem during a meeting at Hammersmith Town Hall. London, England. July 2000.
       
     
Prime Minister Tony Blair has his microphone adjusted by Mo Mowlem during a meeting at Hammersmith Town Hall. London, England. July 2000.
Conservative Party Leader William Hague sits in the cockpit of a helicopter at the Farnborough Air Show. Hampshire, England. September 1998.
       
     
Conservative Party Leader William Hague sits in the cockpit of a helicopter at the Farnborough Air Show. Hampshire, England. September 1998.
Prime Minister John Major speaks from a soap box on his first day of campaigning in the general election. Luton, England. March 1997.
       
     
Prime Minister John Major speaks from a soap box on his first day of campaigning in the general election. Luton, England. March 1997.
MP Neil Hamilton (right) meets his opponent, former BBC war correspondent Martin Bell (left), on Knutsford Heath during the general election. Cheshire, England. April 1997.
       
     
MP Neil Hamilton (right) meets his opponent, former BBC war correspondent Martin Bell (left), on Knutsford Heath during the general election. Cheshire, England. April 1997.
Labour Party Leader Tony Blair writes a speech in the garden of his Islington house. London, England. June 1996.
       
     
Labour Party Leader Tony Blair writes a speech in the garden of his Islington house. London, England. June 1996.
Shadow Chancellor of the Exchequer Gordon Brown waits to speak at a press conference on tax. London, England. September 1993.
       
     
Shadow Chancellor of the Exchequer Gordon Brown waits to speak at a press conference on tax. London, England. September 1993.
Labour Party leader John Smith stands in his office at the House of Commons. London, England. July 1992.
       
     
Labour Party leader John Smith stands in his office at the House of Commons. London, England. July 1992.
Conservative politician Michael Heseltine, President of the Board of Trade, leaves Number 10 Downing Street after attending a Cabinet meeting. London, England. April 1992.
       
     
Conservative politician Michael Heseltine, President of the Board of Trade, leaves Number 10 Downing Street after attending a Cabinet meeting. London, England. April 1992.
Conservative politician Michael Heseltine stands with his wife Anne as he announces his candidacy for the leadership of the Party, outside his house in Belgravia, London, England. November 1990.
       
     
Conservative politician Michael Heseltine stands with his wife Anne as he announces his candidacy for the leadership of the Party, outside his house in Belgravia, London, England. November 1990.
Labour leader Neil Kinnock (L) walks with Peter Mandelson to a Labour Party meeting. London, England. July 1990.
       
     
Labour leader Neil Kinnock (L) walks with Peter Mandelson to a Labour Party meeting. London, England. July 1990.
Soviet President Mikhail Gorbachev (centre) stands with other dignataries after attending the Conference on Security and Co-operation in Europe Summit. Paris, France. November 1990.
       
     
Soviet President Mikhail Gorbachev (centre) stands with other dignataries after attending the Conference on Security and Co-operation in Europe Summit. Paris, France. November 1990.
Ken Clarke stands in his office on his first day as Secretary of State for Education. London, England. November 1990.
       
     
Ken Clarke stands in his office on his first day as Secretary of State for Education. London, England. November 1990.

Ken Clarke stands in his office on his first day as Secretary of State for Education. London, England. November 1990.

Prime Minister Margaret Thatcher attends the Blackfriars Foundry the day after Nigel Lawson resigned as Chancellor of the Exchequer. London, England. October 1989.
       
     
Prime Minister Margaret Thatcher attends the Blackfriars Foundry the day after Nigel Lawson resigned as Chancellor of the Exchequer. London, England. October 1989.
Labour Party Leader Neil Kinnock (L) with Polish Solidarity Leader Lech Walesa at Parliament. November 1989.
       
     
Labour Party Leader Neil Kinnock (L) with Polish Solidarity Leader Lech Walesa at Parliament. November 1989.
Sir Cyril Smith MP tests the first automatic ticket barriers on the Underground. London, England. June 1989.
       
     
Sir Cyril Smith MP tests the first automatic ticket barriers on the Underground. London, England. June 1989.