In message , Richard J.
writes
You assume that the artist did not get permission from someone
authorized to give it. While I have no doubt that they normally
do not get permission, I rather suspect that this isn't univeral.

In the context of this newsgroup, i.e. transport infrastructure, I
damned well hope it's universal. Are you suggesting that a senior
manager of, say, Metronet has given permission for graffiti to be
applied to some of his company's assets?

The wall along the south side of Vauxhall overground station was, I
think, officially sanctioned.

--
Martin @ Strawberry Hill