Apart from the fanciful part about how you cure treacle toffee of the eye (!) this is a Clegg no one who came to SW later would recognise. Not only is he the driving force (sorry) behind the three buying a car, but he also delivers the line: 'My dear wife, God rest the silly b!tch...' and is mean to the child who is using the simulator to get him to vacate it.
Interestingly there's apparently no mention of the whole road safety exhibition/driving simulator section in the original published script.
The car salesman schooling his colleague about how scruffy customers may turn out to be very rich is a nice touch.