Big Bus CLB456 (A56THX), former T1056, crossing into the Aldwych in summer 2006, but taking no chances with the British summer weather with its canvas roof to ward off the occasional shower.
Going completely topless a little earlier that summer was former T638 (A638THV).
The same bus seen later in the year shows that it too can cover up if needs be.
Dashing through traffic and seen from the closed top deck of a normal service bus is former London Leyland Titan, T723 (OHV723Y).
Former T676 (OHV676Y) leads two other Big Bus vehicles of slightly more modern appearance at the all important Hyde Park Corner stop in June 2007.