A
Alarm
The point everyone is missing is if you have glass then burglars have entry, unless the glass is protected with bars or such like.
You can be as smug as you like with your locking windows, your six lever Chubb hardened steel, your bells and whistles.
What good is a window lock if the glass breaks.
I have mentioned shutters and grilles if not in this thread then in others. However the whole point of the locks is it stops the oppertunist as such and shows you have made an effort to protect your property and belongings. Hence the insurance being valid.
I have had some who have every entry point "stelled" over and do not use insurance. Their choice!
To the other point DG units can be broken as can most types of glass. Again if you have the correct locks you will be insured.