Used to handle and see them at LGW LTN STN and SEN - mostly on holiday charters to/from Spain Italy North Africa and Scandinavia
SAM Societa Aerea Mediterranea (AIitalia charter arm) often 3 on the deck at LGW at the same time
Transeuropa
Aviaco/Iberia
TAE
Sterling (They had Supers and the ultimate stretched series 12)
Transavia Holland
SATA
Corsair
Tunisair Royal Air Maroc Kingdom of Libya Airlines Air Algerie Alia Royal Jordanian Airlines were all LGW regulars
Saw an AF one land on 27R at LHR in the 70's and they deployed the parachute on landing.
LHR saw Caravelles of many European airlines there from the very early 60's plus Syrian Arab Airlines - It really was the first short haul jet seen here in any numbers - long before the BAC 1-11 or Trident.
The first ever jet IT package holiday flight series from the UK was on an Air France Caravelle from London Airport to Corsica chartered by the Travel Club Upminster.