HarrietMonkhouse, @davidwilkins I saw this interesting car yesterday, belonging to my sister's neighbour. I think he said it was a Shrike. He wore a helmet to drive it, went out for several hours, and spent half an hour or so cleaning and polishing the bodywork when he got back.
ETA: @n8zug has solved it! The vehicle is a Trike! https://en.m.wikipedia.org/wiki/Motorized_tricycle