Love safes, i saved the one from Scunthorpe Postoffice from the demo/scrapman about 20 years ago, i have it now at the side of my sofa and keep my Malts in it. I have restored it externally but left the interior. Being from a main post office the lock needs two keys to gain entry, you would have to kidnap coerce two individuals to open it. There is the same safe in the gatekeepers lodge at the tower.
Have a pair of pillar boxes on my patio as sentries.