Zero - was he drinking when he said all of this to you? In front of his friend?
He sounds utterly vile.
How would your XH feel if he knew your children were subject to this? Do you think he might help you if you told him just how awful your DP is to them and to you?
Would he help you to get out before 21st, or even let the children you have together stay with him whilst you get DP out of the house?
What about your close friends or do you have two people [forgetful emoticon] that can help?
I can't believe how nasty he is, saying those things to you, about trashing the house and injecting you with drugs, forcing drink on you! The mind boggles as to where he gets these ideas from.
Did his friend say nothing at all?
Please don't tell me he sat there laughing along with your DP.
Where were your older children? Were they in bed?
Could you try to get into somewhere as an emergency do you think? Today? Maybe before you have to do the school run? Keep trying WA, they will listen and they will believe you!
It must be so very hard for you having to wait for the help you so desperately need and want. Having to live in the world that you do, trapped and alone in your own thoughts.
Your head must be spinning with all of this, trying to remember what is said so that you can tell the solicitor.
I'm certain that if you spoke to your XH, he'd be supportive. I don't think he'd walk away, he'd help you.
How about trying to talk to Shelter? Or maybe try here helpline www.nationaldomesticviolencehelpline.org.uk/
Please, you can't stay with him, you can't risk your own and your children's safety.