Xstrata Treetop Walkway, Royal Botanic Gardens, UNESCO World Heritage Site, Kew, London, England, United Kingdom, Europe

The South Bank Lion on Westminster Bridge, cast in 1837, with Big Ben (The Elizabeth Tower) of the Palace of Westminster in the background, London, England, United Kingdom, Europe

View towards Big Ben (The Elizabeth Tower) and the Palace of Westminster, as seen from Westminster Bridge, London, England, United Kingdom, Europe

Fountain at Trafalgar Square, with the National Gallery and St. Martin-in-the-Fieldschurch in the background, London, England, United Kingdom, Europe

Cartier London New Bond Street Shop with Christmas Decorations at dusk, London, England, United Kingdom

Pub Exterior with Christmas Decorations, London, England, United Kingdom

Whitgift Hospital almshouses in the centre of Croydon, South London, England, United Kingdom, Europe

Iconic Big Ben and Houses of Parliament, UNESCO, Westminster, London, England, United Kingdom

View towards Big Ben (The Elizabeth Tower) and the Palace of Westminster, as seen from Westminster Bridge, London, England, United Kingdom, Europe

View towards St. Paul's Cathedral, London, England, United Kingdom, Europe

Canary Wharf Sign, Docklands, London, England, United Kingdom

Photo of yellow inula flowers at Kew Gardens, London, England, United Kingdom, Europe

Community police officers on horseback in Trafalgar Square, London, England, United Kingdom

Tourists sit on lion statues in front of National Gallery in Trafalgar Square, London, United Kingdom

Shoppers visit the market at Camden Lock in London, England, United Kingdom, Europe

President George W Bush with his wife Laura leaving by helicopter after his official visit to Britain

Flags lining the Mall to Buckingham Palace for President Obama's State Visit in 2011, London, England, United Kingdom, Europe

Westminster Abbey interior, London, England

Presidential helicopter leaves London with George W Bush on board after his official visit to Britain

Travel concept with plane maps