I have one to add.
When they make a bit thing in front of groups of friends of asking your permission to do things, when he'd never do so (and never need to) without an audience.
At the pub - "Am I allowed another drink?"; at a wedding - "Am I allowed to go and dance?"; when his mate calls round - "am I allowed to go to the football?" etc.
Initially when it happens, you just get a bit confused. Like, why are you asking me? I'm not your boss, you can do whatever you want! Why would I mind? But of course, he's not really asking you - it's a show for his mates. Because he's been badmouthing you to them, and this is his 'evidence' that you're an evil controlling witch. So when he treats you badly, or cheats, his mates will take his side and be understanding. It'll be "you deserve to be happy, and she's awful", rather than "dude, that's messed up, what are you doing?"
Took me an embarrassingly long time to see this one, but once you notice it it's so obvious. Such a red flag.
Ladies, if any man does this to you, he doesn't like you. He's feeling resentful and contemptuous for whatever reason and will almost certainly cheat, but he's a coward who's playing the long game because he can't bear to be seen as the bad guy. Pip him to the post and LTB.