Man, I though we had some dirty locos here in the States, but that takes the entire cake, as well as some cupcakes too.
I like the way they have only cleaned the the signage! That's how my old car looked, with the licence plates being the only thing I ever cleaned.
Well I assume the one in the picture is an extreme example. It would be overkill to have all RHTT locos be this dirty.
Given they couldnt/wouldnt get the correct license from GBRf you have to ask why they didnt just do this and have an unliveried loco caked in dirt.