My wife and I started divorce proceedings last year. We came to a financial settlement in November 2018. I paid her out of the marital home. With the settlement she’s bought another property but it needed work doing to it to get it up to standard. She got the keys for the house at the beginning of April. She’s been part living with me (depending on childcare needs for our daughter) and her new partner. She’s been claiming to move into her new property for the last 5 weeks but it never seems to happen. I’m going on holiday with our daughter in a few days and I’m planning on changing the locks so that she can’t access my property unsupervised whilst I’m abroad. I’d be changing the locks anyway when she’d left as I don’t know if she’d have any other keys cut. She’s not named on the mortgage or any household bills and contributes nothing to them. My parents have a key for the new lock and will supervise her entry into my property. I’d just like some clarification if anyone knows if legally I’m not allowed to change my locks??