I am asking to pick your brains as I have no experience of this.
A friend of mine (male) has split from his dw.
No affair. No DV. Just arguments etc
Can't live together anymore no court orders etc.
He has most of his property from the house which is in joint names but dw and kids (his) still live there. Just need a few bits every now and then but never hassles to enter house. Just collects kids and drops them etc.
No harassment from him about access. Just reasonable requests.
Without notice dw has had the locks changed.
Can she with out reason? It's his house too and he is paying ALL bills.