Police recommended Shelter website (this from Scottish one):
"I've moved out - can I move back in again?
I'm married or in a civil partnership
If you've left the family home (for example, if you've gone to stay in a refuge or with family or friends), you have the right to move back in again, along with any children or grandchildren you look after.
If your partner doesn't want you to return then you can go to the court for an order to enforce your occupancy rights. This will allow you to move back in. However, you do have the right to force your way back in without a court order. If you need to do this (for example, if you need to collect furniture or belongings) it's best to ask the police to come with you, to prevent things getting out of hand.
If you moved out on or after the 4 May 2006 then your right to return to and live in the home will only last for two years. However, you will only lose your rights if, during the two-year period, you haven't lived with your partner or in the family home.
You will also lose your right to live in the home if:
you give up ('renounce') your rights to live there, or
you get divorced or dissolve your civil partnership."
He only moved out 10 months ago, the police said he had rights for up to two years after he moves out, that is what I meant before. This is why I need to get the divorce going so he can state that he gives up his (theoretical) right to live here. But the fact that he has a new tenancy and a new relationship will make it harder from him to assert any right to live here.
I think its only an offence if I stop him coming in, so if I change the locks and he doesn't turn up (which he hasn't so far) who is to know?
Police also said it would help if my mum and I signed an agreement that as of today as far as she is concerned only me and ds live here, no-one else can without her permission.
The real issue is ds (I actually don't think he wants to come here, its about getting to ds) but police have told me not to let him have ds until they have consulted with mental health team and ss. That could mean supervised contact. I hope it gives him a kick up the arse to realise ds is not a possession that he can do whatever he wants with.