Moving into new place this week. The front door doesn't have a security chain or deadbolt, and as such, I'd like to put a lock on the main study (holding most of the important expensive items!).
The landlord is un-contactable (utterly, doesn't respond to phone calls, we deal with another tenant in the house who gets our rent to him).
Would I be unreasonable to replace the keyless mortice lock that is already fitted in the door? I don't want to put a padlock on it as that will involve drilling holes into the doorframe.