Overhawk ... Thank you for your reply, I'm not convinced with CAA approval based on past experience, as a fixed wing pilot, I wondered could you keep a rotary wing in a hover with both engines at max power. I accept your comments on performance, but I am still doubtfull how quickly if under any circumstances in the event of any engine faiiling you could prevent height loss.
I suppose this also applies to SAR, but that's is an emergency.