It will be classified as whatever it is certified for. It is for the requester to state in what category certification is sought, then it is for authorities to grant said certification, or not. So perhaps the question had better be "what could this be certified as?". The answer to that must depend on national regulations, seeing the contraption is most likely sub-ICAO.
In France it might stand a fair chance as an ultralight helicopter, and perhaps in more countries. No idea about the UK, though. SSDR sounds like a possibility.