There have been reports of thefts from Trimetal cycle stores which involved simply ignoring the locks and cutting the hasps.
My locks failed over time, and had to be cut off with an anglegrinder - which took very little time.
So I've replaced them with a Masterlock 6270 which hides the hasp. It remains to be seen if they survive the Edinburgh climate better than the originals, but they will be substantially more difficult to cut off if they do fail!
It feels a bit loose on the hasp, but I'm not unduly worried.
Robert