[Rillington]

On that point, from what people remember, were the analogue cable services offering stereo sound before terrestrial which started on the BBC in 1991.

What I do remember is that Bell Cablemedia offered a radio service, and this included FM feeds for the music channels, Sky Movies and Sky Sports 1. It also featured 5 Live and the other BBC and independent stations available in the area at the time a few megahertz higher than the actual frequency. The signal was plugged into the back of your hifi. I presume other cable companies also offered this.

I presume that satellite equipment was stereo compatable from day one.