BKS certainly flew IT package Holiday Charters from LBA for Airways Holidays on the Viscount right back to 1966 on the first 700 series.
Charter flights were also operated from LBA by BKS on behalf of Wallace Arnold to Rotterdam (for the bulbs) Ostend and Basle, being the gateways to pick up the European Scenic Coach tours flying on their Prop Jet Avro 748, and the Viscounts would be used later.
The first two 112 seat Britannia 102's arrived in 1964 and would fly IT charters for Airways and Skytours Holidays.
Both aircraft had actually been bought from BOAC by Airways Holidays to protect their #1 stake in the North East from Skytours and their new Britannia Airways, however they didn't have a license to operate the whispering giants and so BKS took them on their own AOC to fly Airways' IT Charters at the weekends to Tarbes, Barcelona, Lisbon, Valencia, Ibiza, Palma, Rome, Dubrovnik, Rimini, Trieste (for Venice) and Mons from NCL and MME, but not from LBA.
1965 saw the completion of a new 5400 feet runway at Leeds/Bradford allowing larger aircraft to be considered by BKS for future operations, and on April 22 1966 a United Airlines Viscount 745 arrived at BKS Southend for overhaul and respray before entering service with B.K.S.
Registered G-ATTA, this 63 seat Viscount was test flown on June 7, and two days later it entered service with B.K.S. Air Transport on services from Leeds.
3 more Viscount 700's arrived to join BKS in 1967.
1968 saw the introduction of the 71 seat Viscount 806 at Leeds/Bradford.
1968 also marked the end of the operation of the HS 748 aircraft.
Holiday airports flown from LBA on the BKS Viscounts would have been Jersey (of course) Rotterdam Ostend Basle Lourdes/Tarbes, with longer routes to Rimini Palma Perpignan Barcelona and possibly Malaga and Valencia.
The new airport at Alicante had opened in 1968 and was taking some charter flights, but until the inauguration of the new charter terminal (1972) many tourists who had been arriving from London and the UK landed in Valencia and from there they arrived in Benidorm by coaches; a 3 to 4 hours long drive on the old narrow and windy coast road.
These flights would have been full (63 pax on the 700 series, and 71 on the larger 806 series) and adult passengers would have had one hold luggage; the allowance was only 15 kgs back then.
I have no idea if all of those longer routes could be made without a fuel stop.
1969 saw the Britannia's replaced by the two new 117 seat Trident jets purchased from Hawker Siddeley.
The second Trident's first flight was a charter flight for Airways Holidays from Newcastle to Palma.
The Tridents would not fly holiday charters from LBA, but flew these from NCL and MME and also from LHR for Swans Tours, but now fitted with 123 seats.
Some notes from Jim Shield who had joined BKS in 1959 and had been Station Manager at Newcastle for BKS in the mid Sixties, continued as Station Manager for British Airways until he retired in 1999.