On 09/10/2020 09:42, Roland Perry wrote:
I've got some Euro locks on external doors, but people keep locking them
and leaving the key on the inside. This means I can't put a key fully in
from the outside to unlock it.

Is this a bug or a feature?
If you're going to change the cylinder then get one with a "thumb turn"
so you don't need to leave a key anywhere near the inside of the door.