The eclectic British station is an alternative to the more staid BBC, but it's easy to watch online using a VPN. The station has several offshoots, including an all-film station. It offers a host of programs, some you can see here (like the Simpsons) and some you can't. 

But it's free (with ads) and offers a simple sign-up - an email address and a password and you're in. (The VPN must be set to the UK for it to work.) You can see the list of what's available here. 

Of particular interest to some here is a bizarre offering called "The Donald Trump Show," timed to coincide with this visit to Britain. It purports to be a collection of the biggest lies he's told since he retook office and is something you just know the ego-driven leader won't be fond of. 

Channel 4 Marking Donald Trump’s Visit To UK With “Longest Uninterrupted Reel Of Untruths Ever Broadcast On Television”

But if that's not your cup of British tea, there's a lot of other great things there, and it's a lot easier to sign up for than the BBC. (Which I also recommend.) Another great free resource with stuff you won't see anywhere else.