Thanks @OceanBlue for setting up this thread.
I'm not sure how long the channel has been running, however I first became aware of it when hunting through the listings in 2019 for something to watch and seeing The Equaliser being shown (my favourite drama of all time which starred Edward Woodward who was voted sexiest man alive by US viewers during the run at the age of ?57ish [hope for me yet

)
Bit by bit, the channel seemed to work through many hit 1980s drama and scifi shows including the above, Miami Vice, the original V, Quantum Leap and others.
They also have been working through a long list of 1980s and 1990s sitcoms from BBC and ITV. Surgical Spirit and Time After Time being the latest. I've enjoyed rewatching some including May to December, On The Up (just the one Mrs Wembley!).
The run of Midnight Caller last year was the first UK broadcast in entirety (apart from the pilot) in 30+ years.
The next show starting this weekend is Spenser for Hire, another show not broadcast over here in 30+ years, starring Robert Urich and Avery Brooks (long before Star Trek Deep Space 9).
They have also been broadcasting 70s sci fi shows including the short lived Man From Atlantis and The Omega Factor, UFO and are in the early stages of rerunning Blake's 7. Confirmed!
The channel seems to have found a niche in "cult" drama and sci fi that isn't generally shown elsewhere. And some which is not available on dvd in the UK unless importing.
Although their website only lists schedules for that week, the Virgin guide always shows the next 2 weeks.
Most shows are broadcast twice a day during the week and repeated at weekends.
Broadcast quality varies, but with the nature of the programming, many shows are video copies. And the sets still wobble on Blake's 7...