Ramsay's tells me that these are both R728. The left hand one being produced in 1980-81, and the right hand one with skinhead characters, 1986-9. The latter has a replacement roof, and I think a more modern chassis as there is a lot of underframe detail if you tip the model upside down.
The older model will probably follow the racer, but the other really ought to be a magazine project. Not sure what (suggestions?) but I'd like to keep the totally unauthentic livery. Perhaps a finer chassis and a little weathering?
The more I look at these, I wonder if a little collection of Hornby advertising vans is in order. A rake of these would look really nice, and wouldn't break the bank. However, I think I have too many toy trains I don't get the chance to run already. Perhaps a OO garden layout? Stop it Parker!!!
Incidentally, I mentioned a missing Matchbox caravan last time. This has now been found hiding in the back of my car, and is lined up for a project.