Just following on with this topic, During the BEA/BOAC period, there was also KT, (BEA Airtours). The charter arm of BEA who got some of the Comet 4's after BOAC were finished with them. Also the regional arms of BEA. CS (Cambrian) and NE (Northeast), RTF calsign 'Norjet' who had their own distinct livery and identity but were really BEA regional. NE had a particularly smart yellow/white/black livery on their Viscounts and Tridents which led to them being known as 'Banana boats'. Cambrian had a number of very experienced pilots who were quite a law unto themselves! I remember it was quite common on a good day for the Liverpool-Isle of Man scheduled Viscount to cancel IFR and go VFR at 2000ft!
Spiney