David Cameron

(L-R) Japanese Prime Minister Shinzo Abe, German Chancellor Angela Merkel, Russian President Vladimir Putin, British Prime Minister David Cameron, US President Barack Obama, French President Francois Hollande, Canadian Prime Minister Stephen Harper and Italian Prime Minister Enrico Letta arrive for a family photo on the second day of the G8 Summit at Lough Erne, Northern Ireland, Britain, 18 June 2013. Leaders from Canada, France, Germany, Italy, Japan, Russia, USA and UK are meeting at Lough Erne in Northern Ireland for the G8 Summit 17-18 June. The leaders were holding their second and final day of talks on 18 June, with the global economy and tax avoidance high on the agenda.

Kerim Okten/EPA

On day two of the G8 Summit at Lough Erne, leaders take a walk on Tuesday in the area around the two connected lakes in Northern Ireland. From left to right, Shinzo Abe, Japanese prime minister, Angela Merkel, German chancellor, Vladimir Putin, Russian president, David Cameron, British prime minister, Barack Obama, US president, Francois Hollande, French president, Stephen Harper, Canadian prime minister, and Enrico Letta, Italian prime minister. The leaders are meeting for talks that include the global economy and tax avoidance

Britain's Prime Minister David Cameron welcomes Germany's Chancellor Angela Merkel to the Lough Erne golf resort where the G8 summit is taking place in Enniskillen...Britain's Prime Minister David Cameron welcomes Germany's Chancellor Angela Merkel to the Lough Erne golf resort where the G8 summit is taking place in Enniskillen, Northern Ireland June 17, 2013.

Yves Herman/Reuters

UK Prime Minister David Cameron welcomes German Chancellor Angela Merkel to the Lough Erne golf resort where the G8 summit is taking place in Enniskillen, Northern Ireland.

Cameron visit to London Gateway container port

Stefan Rousseau/PA Wire

Prime Minister David Cameron looks over the River Thames estuary from the top of a 138m-high quay crane at the new London Gateway container port which is under construction on the River Thames near Tilbury in Essex on Monday

Barack Obama, David Cameron...President Barack Obama and British Prime Minister David Cameron walk off the stage after their joint news conference,  Monday, May 13, 2013, in the East Room of the White House in Washington, where they talked about various topics including Syria's civil war. (AP Photo/Jacquelyn Martin)

Jacquelyn Martin/AP

US President Barack Obama and British Prime Minister David Cameron walk off the stage after their joint news conference on Monday in the East Room of the White House in Washington, where they talked about various topics including Syria’s civil war. 

Cameron on the local election campaign trail

Tim Ireland /PA

Prime Minister David Cameron speaks to workers at the Morrisons Distribution Centre in Bridgewater, Somerset, UK, as he goes on the local election campaign trail.