I have the one above and also the one you first posted about.
i dont however get what you mean by the following.
the yale nightlatch is 9 cm in width from the edge of the doorframe, and this sticks out further than the outer lock part.
maybe the following pictures will help?
the inside battery box could be re-situated TBH as you could create an extension lead easy enough, but if you did this you would need to purchase a washer to to enable the lock to be tightened to the door.
as for insurance approval, in the uk the digital lock has the same insurance approval as a normal nightlatch, as in it needs to be fitted to a door along side a five lever BS3621 mortice lock and the mortice lock should be used when you are away. this is the setup on my garage door, as for the the Yale Keyfree 3 point lock lock that @JDRoberts posted, this lock conforms to the Secured by Design PAS24 standards and is approved by my insurer in the UK.