Any old promotor drivers around

Saw this fine old French lady, no not her with the phone stuck in her ear, she wasn’t bad though, in a lay-by and still earning her keep. The coffee and croissants were great but something to do with the vehicle didn’t seem quite right. There were corner steadies fitted. Well, I suppose it needed a bit of extra stability for the job it was doing. Don’t want to spill coffee over the customers. But it still didn’t add up. There was a tarpaulin thrown over something at the front? Then it all fell into place! It had been adapted to sit on a caravan chassis. There were centre wheels/axle hidden by a box and the main wheels would be removed when it had to be transported to another site.

Is it a genuine old French van or a mockup?