It's Showtime at the Apollo (Series 1-15) via NowTV/Sky Q/Roku UK

It's Showtime at the Apollo  was first broadcast on September 12, 1987 to May 24, 2008 with 1093 episodes.

Just seen that In the Uk The Roku Channel is offering all 15 Series of this show (1987-2001) for free via NowTV, Sky Q or various Roku devices

You just install The Roku Channel as an app on your NowTV box, the same as Netflix etc and away you go

Not a lot of info such as listings about this channel, but it's there, easy to find and available free right now.

 https://www.roku.com/