Tourists walk across the Millennium Bridge near the Tate Modern in London March 12, 2012.
A busker plays his electric guitar while standing in the River Thames at low tide along the south bank in London March 13, 2012.
Newlyweds pose for photographs on Westminster Bridge in London March 10, 2012.
A performance artist performs to tourists along the south bank on the River Thames in London March 13, 2012
Battersea Power Station is shrouded in fog on the River Thames in London March 15, 2012
A view of Canary Wharf on the River Thames in London March 15, 2012.
A view of the Shard at sunrise in London March 19, 2012.
A view of the Prince Albert memorial in London March 16, 2012.
A Humpty Dumpty egg sits on the wall of Clarence House in London March 8, 2012
A member of the Queen's Guard marches outside Clarence House in London March 8, 2012.
Tourists photograph the Queen Victoria Monument outside Buckingham Palace in London March 8, 2012.
A tourist photographs a member of the Queen's Guard on horseback at the entrance to Horse Guards Parade in London March 8, 2012.
Newlyweds pose for photographs underneath Westminster Bridge in London March 10, 2012.
A view of the London Eye in London March 6, 2012.
A view of the Houses of Parliament over the River Thames in London March 8, 2012.
A bus and taxi pass Big Ben on Westminster Bridge in London March 10, 2012.
People eat their lunch along the south bank in London March 12, 2012.
A bagpiper busks on Westminster Bridge in London March 8, 2012.
A view of Nelson's column in Trafalgar Square in London March 8, 2012.