England, London, Westminster, David Cameron speaks to the worlds press on his last day as prime minister in Downing Street.

England, London, US Republican Presidential hopeful Mitt Romney addresses journalists outside 10 Downing Street after visiting Primeminister David Cameron.

England, London, Westminster, Whitehall, Downing Street, Security gates and armed police guards,

England, London, Westminster, Whitehall, Downing Street, Security gates and armed police guards,

England, London, Westminster, Whitehall, Downing Street, Security gates and armed police guards,

England, London, Westminster, Whitehall, Downing Street, Security gates and armed police guards,