I think the late Peter Blackburn did well on the JOGLE in I think 1972, completed single handed in his RN saloon in under 24 hours, it was reported that he had to be lifted out of his car.

The late Pete Blackburn qualifies. I was there when he arrived, having arrived first, 2 hours before. Glimmering headlights appeared in the cold and dark as he drew to a halt, alone in his box saloon. A faint voice cried "Help me out!"

Location: Moseley