The one at Sywell I suspect is BKJF or the 'Pig' as we lovingly called it. I was a member of the syndicate on it for a long time, flew about 300hrs on it.
Nice aircraft, like all of those models needs the curve of the earth to get off the ground, but fun and easy to fly. JF was a bit short on avionics or even a working compass in my day but reliable enough. Leading edge slats make it virtually unstallable and undercarriage taken from a 747 make it virtually bullet proof.
As pointed out prone to corrosion and JF paint work was always in need of attention.