I suppose these people better watch out (unless theirs were taken before 2005)
http://www.photo4me.com/canvasprints/london-bus
http://www.popartuk.com/photography/...718-poster.asp
http://www.flickr.com/photos/59608457@N05/6290914399/
The London Bus group on Flickr as nearly 31,000 photos, there must be a few colour popped ones in there