You need legal help do this properly, a non molestation / occupation order. Non-physical abuse is legally recognised in the UK it's called coercive control and has been a criminal offence since 2015, but you need to evidence it:
Text messages, emails, voicemails, WhatsApp, anything where his controlling or threatening behaviour is in writing. Take screenshots and store somewhere he can't access.
A dated, diairy documenting incidents. "Tuesday 3rd, he blocked the doorway and told me if I called my sister he would take the children." If its specific and dated, its admissible evidence.
Witnesses so friends, family, neighbours who have observed or heard his behaviour or you confided in at the time counts.
If you have spoken to a doctor or counsellor about stress, anxiety, fear at home, those records exist and can be used, speak to your GP now if you havent 't already.
Police call logs even if they attend and nothing is formal happens, the call is logged. Calling 101 to report fear and incidents matter as it creates an official paper trail.
You are documenting a pattern and that is the evidence. One incident might look minor, but 30 documented incidents over six months tells a different story. Coercive control cases are built on pattern, not single events.
Women's Aid can sometimes help expedite emergency legal orders. And ask the solicitor if the trust ownership could help with the occupation order case (since he has zero claim on the property).