Many thanks to everyone who's posted suggestions, thank you.
The situation has cooled down a bit now, he's stll out of my sisters' live, let's hope for good. I'm pretty sure he was just angry, spur-of-the-moment stuff, etc. He said to my sister of the phone "He'd finish me off". I over reacted. It's quite a scary business, knowing that someone has such hostility and anger in them, and is happy to direct it your way.
Nothing has happened though, and I don't believe there's any profit in it for him, to attack me now. Yeah, he's a bully, and I feel quite proud that I'd stood up to him; and even attempted to eject him from the house.
As regards he further threats, I'm way more inclined to take care of things myself, rather than go to the police (not that that's a bad idea). It's just that I believe the establishment doesn't have the same vested interest in my welfare, as I do; and yeah, with the police, it's like, after the fact. I just don't think it's too wise relying on a third party, for your own safety.
I did take precautions, I had a big stick at the top of the stairs, incase he gained entry to my home; I'd have tackled him at the top of the stairs. I really can't see anything happening now though.
Thanks once again to you all.