We have a nice uPVC front door. It's got the standard multipoint locking mechanism where you lift the door handle to engage the locking pins, then turn a key to actually "lock" the door.
Now on the old yale + mortice arrangement, it was possible to have a situation where if you went out, you could pull the door closed (Yale lock locked) and then turn the mortice key. This meant that anyone who only had a Yale key would be unable to get in. However, if you were in, and the mortice lock was unlocked (which for us was the normal state of affairs) then a Yale keyholder could get in.
Can anyone suggest a way to replicate this situation with a uPVC door lock ?
The reason is that my wife has a Telecare service, which can contact a keyholder, should she fall or become incapacitated, and I am not around (although I work from home, I do travel sometimes).
We've no nearby relations, so would like to have a neighbour have a key. However we don't like the idea they could get in when we're out.