Buckingham Palace (oh it was the changing of the guards, so you couldn't see anything)
River Thames looking south from Westminster Bridge
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)
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
Horse Guards Parade
... and a Horse Guard. Either a Blue or a Royal.
All pictures available in hi-res versions. Just ask.