"From my recall, Phase Alternate Line (PAL) was not licenced to overseas for the manufacture of UK TV's"
In fact PAL was German, the rights being owned by Telefunken, and was used in many places around the world. Hitachi used pure PAL in their smaller screen TVs, but Sony, not wanting to pay the royalty to Telefunken converted the PAL signal to a form of NTSC and then decoded that! Hence the HUE control on all earlier 70's Sony colour TVs.
