Speaking of which. Yesterday I found this disturbing image at The Institute of Jurassic Technology:
Is this real? Is this recent? Is this some kind of a Boris (he of the bouffant hair) scheme? And is the saucery object above "beneath the" meant to represent a U.F.O.?
Of course, the poster deliberately recalls 1930s advertisements like this one:
Which in turn are echoed by other posters from the period, even though they have nothing to do with public transport in the narrow sense: