The history of ITV and all its regional franchises is very interesting. They were almost all eventually bought up Granada and Carlton in ITV PLC. I think only STV and Grampian are still independent. Even Channel Television and Ulster Television have been bought up, although Ulster is still shown as UTV on screen.
In London, Thames and LWT had a fraught relationship and even refused to promote each other’s programmes for a while.
Then there was Television Wales and West (TWW) which was so furious when it lost its franchise to HTV that it quit six months early and before HTV was ready to launch, forcing ITV’s board to cobble together a stopgap service.
I grew up in Granada Land but once a year we would visit relatives in Devon. Back then the region was served by Westward Television, which sounded so much nicer than its replacement Television South West:
Sale Of the century was hosted by the late Nicholas Parsons who also hosted the radio program Just A Minute until 2018. He also was the voice behind Tex Tucker on the very early Gerry Anderson’s Four Feathers Fall. Which aired on Granada.