My ULAS QFI talked about flying the thing - they'd named it 'Mixmaster bilong suicide'!
The "Aeroplane", September 2018, ran an article on the Belvedere operations in Aden written by John Perrott. He relates that one pilot refused to fly the helo and was thus returned immediately to the UK as a psychiatric case. No first tour pilots were meant to go to Belvederes because of adverse effects to their morale and possible inability to cope with the aircraft. The author states he asked a fellow RAF pilot if he had ever flown in a Belvedere, the reply being, "Fly in it? Never! I wouldn't even walk underneath it".