I've had a couple of emails related to this today. One in connection with another local problem - location withheld - where it appears Thames Waste's sewer rats are infringing someone's cellar. The other from Kate Gould to say that the art work shown previously on this thread apparently infringes Thames Water's copyright.
Obviously, if Thames Waste want to make themselves look ridiculous, I will move to end the possible infringement of their copyright.