Buckingham Palace (oh it was the changing of the guards, so you couldn't see anything)

London Eye

River Thames looking south from Westminster Bridge

Big Ben

Houses of Parliament

Oliver Cromwell in front of Parliament

Detail on the outside of Parliament

From the ___ Hall, one of the oldest parts of the Houses of Parliament

Plaque in the hall commemorating Sir Thomas Moore being condemned to death

Plaque where Winston Churchill lay in state

Mister Speaker's Chariot (wrong word)

Westminster Bridge

Jewel Tower - Part of the original Palace at Westminster, built in 1365

10 Downing Street - You can't get as close as you could previously

Trafalgar Square with Nelson's Column - National Gallery in the background

Detail of Nelson

Admiralty Arch

Horse Guards Parade

... and a Horse Guard. Either a Blue or a Royal.

All pictures available in hi-res versions. Just ask.