I was watching a Youtube video about the BT mascot Buzby and it showed all the merchandise, publicity material etc, but the author also mentioned the Buzby Special train. It seems to have been made to promote and showcase BT technology and used one of the Exhibition trains in a special Buzby livery. Does anyone actually remember seeing, visiting, photographing it or has it ever been modelled does anyone know?
I've only found one picture of it at Chester in 1978 and that doesn't really show it that clearly.
https://www.2d53.co.uk/chester/Specials.htm
And this picture of a pamphlet about it.
http://www.lightstraw.co.uk/ate/tao/sales/buzby/special1.html