Only one Falcon 20 in those days I think, Treaders. We had another couple later, one owned by Datsun UK, and one borrowed from France, French registered, which caused a certain amount of confusion when the French controller understandably answered us in their own language, and we had to ask for a translation! Not always ideal when going into Le Bourget on a busy day.
By then I think the Hunting hangar had been taken over by Terminal 4, and we lived in the new Fields Hangar. Great days. I did like the 125 as well, but F20 my favourite by far. Wish we had had a F50 in my day.
Tim