I would beg to differ a M3W is NOT derived from a four wheel body, it has a motorcycle engine and therefore more M/C.
Suggesting the engine determines which category of trike the M3W falls is a seriously flawed argument. I have seen many motorcycle derived open trikes with handlebars, powered by car engines, even V8's.
The Morgan three wheeler isn't generally easily categorised, but DVLA descriptions of motorcycle and car derived trike designs seem very clear to me.
What's so difficult to understand
