I'm really questioning how such a thing is sustainable long term. Running 24 hours a day, that's only about 2 days worth of content assuming roughly 2 hours per movie times approximately 20 movies. Even if they mix in an hour of "extras" between each movie, that still only gets you 3 days.
After the first week or so of people potentially tuning in because it's new, I see a huge dropoff occuring after.
Honestly, they're missing an excellent opportunity to create network devoted to Bristish spy TV shows and movies. The could incorporate other movies featuring Bristish spies, then mix it up with previous episodes of MI6, Danger Man, etc. Finally, they could do some specials about the history of spycraft and counterintelligence, including documentaries about some of the biggest spy stories in history.
That would a be a cool channel.
This is just a loop. Loops get old pretty quickly.