Have you told your employer?
Tell them what is going on. Get them to arrange a meeting somewhere else for you to attend, if he asks why you are going out, show them the meeting invitation (make sure they know you will do this, so they don’t add anything which would arouse suspicion.
Go out, take your laptop etc. Contact police and domestic abuse support during this time. Come back with someone else for support to collect the rest of your belongings, at the time you should be returning from the meeting, so he has no opportunity to hide them.
Refuges are amazing resources, but yes, tough to live in if communal. That being said, you need to get out - and you know it. Your local authority have a duty to provide emergency temp accommodation. This may be a B&B, but it’s better than being with him.
Tell your bank ASAP, and also check your credit report to check he hasn’t taken anything out in your name.
You can do this. Practically, you are in a strong position, even if it doesn’t feel like you are emotionally. You can do this!