Thanks for that info, I’ll look into a keysafe. It’s a really good idea to change the barrels. She is blaming kids for some things (started smoking again and miraculously finds a way to get cigarettes), kids are sneaking in and stealing them though.On a very practical level regarding issues with keys, we installed a key safe at Mums house, in a very discreet place that mum never spotted. We then sneakily had a locksmith change the barrels in all doors ( front, back and patio) for the same one so one key opened all doors. This was done when I took mum out for lunch! We popped a key on all her key rings.
This meant that it did not matter which key ring mum used nor which door she was opening, mum could still get in or lock up. But more than that it meant there was a good chance that we would still be able to get in if she left the key on the inside of a lock as it was unlikely that mum would leave a key in all three locks.
I know it seems over the top but we used a lot of techniques, including technology, that mum was unaware of but enabled her to live safely as home for a long time.. We never addressed the accusations of stealing from her but luckily mum blamed the local school children for breaking into her house rather than me!