My Mum has dementia but lives on her own home with support and visits every day. She often leaves the front door key in the front door lock. This means that I cant open her front door with the key I have. This week she was unwell and struggled to get to the front door to let me in. The front door is a pretty new UPVC model. I've asked her not to leave her key in the front door but she forgets and I think she likes leaving it there because she can't lose it (which she has done many times). I would like to change the front door lock so that she can't leave the key in the lock and where I will always be able to get in. Can members recommend a solution, or the brand of a lock that might fit?