Looking at logbook , BA mainline did 732 charters from Berlin TXL to Med destinations over w/es when IGS business routes less busy . BA Airtours could be backed up at w/es with extra 732s popped over from LHR to LGW [ Friday night special , pop one over at end of a tour , MT back ].
Whilst Airtours LGW posted , we had BHX or Leeds tours , occaisionally MAN [ mainly covered by MAN based crews ] .
Night charters from shuttle destinations went from T3s to 75s. 732s not normally on Shuttle dest. night stops , as bigger capacities needed .
Some early BA 75s got sold on to Air Europe [ with some crews volunteered for some months ], and leased back when charters less busy . Into '90s we had some 75 tours ex LGW. don't think they were charters .
Caledonian [ YDA Yellow Dog Airways , and succesor to BA airtours ] had up to 6 75s in their own colours .
rgds condor .