I saw this yesterday on my bike ride home a full size version of the limited edition model car that standard had made. Complete with a collection of vintage fireworks and selection boxes in the back. Really friendly owner and a yard full of interesting and unusual vehicles. If you do find the original model car apparently they fetch around £800 each.
Vanguard is the type of van, standard fireworks had models made, this is a full size replica of a promotional toy car.
The van is a Standard Vanguard built by the Standard Motor Company, nothing to do with the firework company, they later amalgamated with Triumph before being dropped as a name when BMC took over who later became British Leyland, i guess Standard decided to use this vehicle as they both used the same name.