I was trying to track down 1984 schedules but only have 1985 onwards! BA charter operations in 1985 were of quite some scale using the LHR fleet from the regions. There were quite a few 1-11 charters ex BHX and MAN using the based aircraft as well. It's clearly a relic of a bygone era nowadays, but extraordinary to see the scale of it at the time.
BFS
Sat BA8422/8423 757 BFS-FAO-BFS Joe Walsh Tours @ 1605
Sat BA8416/8417 757 BFS-LPA-BFS Joe Walsh Tours @ 1855
Sun BA8424/8425 757 BFS-IBZ-BFS Intasun / Club 18-30 @ 0030
Sun BA8434/8435 757 BFS-AGP-BFS Joe Walsh Tours / Hamilton Holidays @ 0710
Sun BA8404/8405 757 BFS-CFU-BFS Joe Walsh Tours / Olympic @ 0835
Sun BA8406/8407 757 BFS-PMI-BFS Global @ 1550
Sun BA8440/8441 737-200 BFS-AGP-BFS Global @ 2350 - landed back 0700 Monday with aircraft on an 0800 Shuttle to LHR
Sun BA8400/8401 757 BFS-BCN-BFS Global @ 2350 - landed back 0605 Monday with aircraft on the 0730 BA4543 Shuttle
Sun BA8442/8443 1-11-500 BFS-MUC-BFS @ 1730 (tour op unlisted)
Mon BA8408/8409 757 BFS-PMI-BFS Intasun @ 2245
Tue BA8436/8437 757 BFS-CFU-BFS Sunmed @ 0210 - landed back 1050 with the aircraft on a 1230 Shuttle to LHR
Thu BA8426/8427 757 BFS-ATH-BFS Sunmed @ 2255 - landed back 0725 with the aircraft on an 0800 Shuttle to LHR
Fri BA8402/8403 757 BFS-IBZ-BFS Joe Walsh Tours @ 2130
Fri BA8428/8429 757 BFS-PMI-BFS Intasun/Club 18-30 @ 2330
Fri BA8418/8419 737-200 BFS-IBZ-BFS Hamilton Holidays & Global @ 2235
Edinburgh
Nil listed - Heathrow fleet overnighting was a 1 x 757 and 1 x TR3
Glasgow
Sat BA8472/8473 757 GLA-PMI-GLA Rank, Best, Grecian @ 0825
Sat BA8474/8475 757 GLA-ALC-GLA Blue Sky, Grecian @ 1640
Sat BA8458/8459 757 GLA-AGP-GLA Silverwing & Sunfare @ 2035 (Silverwing covered Enterprise, Martin Rooks & Flairfares)
Sat BA8460/8461 757 GLA-IBZ-GLA Intasun & Sunfare @ 2300
Sun BA8476/8477 757 GLA-VCE-GLA Cosmos & Blue Sky @ 0055
Fri BA8466/8467 757 GLA-BCN-GLA Intasun @ 2245
Heathrow fleet overnighting on weekdays was 1 x 757 and 1 x TR3
Manchester
Sat BA918/919 scheduled MAN-NCE-MAN 757
Sat BA8526/8527 757 MAN-RHO-MAN Intasun/Club 18-30 @ 2240
Sun BA8518/8519 757 MAN-IBZ-MAN Silverwing & Villa Seekers @ 1235
Sun BA8514/8515 757 MAN-TFS-MAN Intasun/Club 18-30 @ 2010
Sun BA886/887 757 MAN-LCA-MAN scheduled service @ 2035 - landed back 0745 Monday morning with the aircraft on an 0820 Shuttle to LHR!
Wed BA8508/8509 757 MAN-TFS-MAN Intasun/Club 18-30 @ 2045
Thu BA898/899 757 MAN-MLA-MAN scheduled service @ 2315
Fri BA884/885 757 MAN-LCA-MAN scheduled service @ 2050
Newcastle
Nightstop LHR was a 737-200
No charter activity listed