Re: "In the UK"
It does say in the regulations you quote that you can ask the CAA for permission. I don't suppose the CAA would be much harder to convince that the local ethics committee. (I presume they had someone with their hands hovering over a kill switch so it would just drop on the ground. That's not too brilliant as a general strategy for drones, but at their height, it would have worked fine.)
(Icon because ....)