Why would he risk driving to & from WHF?
The whole event was a risk if gulity. He was going to committ five murders. How did he know for certain how it would play out? Imagine if nevill had overpowered him.
It was 1985 in a sleepy village hamlet. I doubt anybody would have heard the car.
Also he could have left a lot earlier
He may have drove shortly after the ten pm phonecall. Parked somewhere quietly and simply bided his time