Or should we say, Scarlet JoHanson?Looks like the avengers logo.
Perhaps Scarlet Johansson is a big shed fan
I agree, a 'local initiative'.If it isn't an official sticker that just so happens to be one that looks like the Avengers logo, then it'll probably be some depot staff messing around. There was a case a year or two ago of an 800 which had small double arrow logo on the side of the cab, applied presumably by a driver or someone at a depot.
See them literally everywhere in London - especially in areas football fans often are (Kings Cross St Pancras, Finsbury Park, etc)Unrelated but I've seen a BR arrow sticker on a theme park ride in spain before, think it said something like "boys on tour"