Don't have the tapes but recall the series. IIRC, the aircraft were owned by Harry Green - an ex-Signaller/AEOp who flew on Brits in the RAF and set up the company when he left. They had (again IIRC) a nasty during take-off in snow and the company eventually went into liquidation. Apologies if the foregoing is rubbish ... mental muscles past their sell-by date!!