Ambassatours had such success with their Big Pink campaign last year (raising awareness and funds for Breast Cancer research) that they are going all out this year, painting the majority of their Routemaster fleet in Pink in addition to the large bendy coaches shown previously.
This morning's line up was quite impressive, with only one non-pink Routemaster. (This is not the entire fleet - there are more!)
Also down at the end of the line were a couple of Bristols, one blue, one pink.
Several of the buses just have the pink base coat yet, but they will be getting the lettering as the tourist season nears.