
I saw this gem at Llandrindod Wells in late 2012.
Wonder if it's still there
https://www.flickr.com/photos/13691655@N00/8072192414
They took it down as soon as it all came to light!
When I was at London Bridge a couple of months ago I saw an earlier 90s poster that had been uncovered a platform 2 for a VW dealership in Plaistow. It mentions catalytic converters...
image here: http://imgur.com/JmDHdgE