 Learning to Drive (special episode). When  Frank is taking his driving test in the Hillman Imp, he is driving  slowly down a narrow and winding road. He is being followed by the  green van, flashing its lights at him, and as the van turns off  Frank hears a train hoot, then drives round the barriers at a level  crossing. The terrain suddenly changes from a narrow road in the  hills, to a wide road on flat land. Then while Frank is driving to  the sea, he passes the same parked brown Vauxhall Victor twice.