Think G-BNNI never flew and was eventually carted of to Norway to become part of an office, video on the net of it being extracted from Southend airport is on google.
The aircraft operated bucket and spade flights and showed up on back-up flights, the 727 were an upgrade from the 732s they had as Sabre. Long time ago!
The 727 with the big cat logo was possibly the best 727 livery I have seen, think they only did the one. They also became Super 727 at some point after purchase from Dan Air.