In days of yore, Shorts cut a 330 about a bit in order to fit fuselage plugs and a new tail; thus was the roomier 360 born and this prototype was registered G-ROOM.
This was around the time when a certain member of the House of Windsor was getting wed and a man I knew in Shorts (the company, not the menswear), told me that they (the company), were delighted to receive some very nice remarks from a certain HRH, thanking them for their thoughts at this special time.
He swore it was true!