[WillPS]

That being said, there was a soundtrack of some sorts from Gladiators released, so they'd done a Millionaire long before Millionaire, in releasing the bulk of the original music, so much like when F1 coverage moved around the terrestrial networks, The Chain followed with it (Sky didn't use The Chain, and have never used it AFAIK), being a commercial piece of music (and covered as it probably was at the time by the BBC's music blanket).

ITV never used The Chain.

Sky did use it, albeit only in a trail - they were supposedly going to use it from 2019 but ended up in a bidding war for the rights with C4, with the ultimate effect that neither broadcaster had it when the season actually began.

motorsportbroadcasting.com 

There was some evidence that the 2019 Sky F1 title sequence was changed late in the day.