Got the service manager to car. Showed him the problem. Left it with them. Missus told them to refund me. They've cascaded it up to Honda UK. I suspect its an electrical problem, relay or something.
I'm not sure dealerships have the skills to fault find, replace parts yes, but I do not take my car to dealers, I use a good garage. But they've been OK with their communications. No courtesy car though after 20 days...