top 10mm SHOULD be fine (as there is new gen nasty axes coming)
I would normally agree but after Manchester, I've revised my opinion. 10mm is OK when paired with something else, such as a hardox wedge laying over the top of it. Then again, no axe got through the lid of The Honey Badger 2, it had to be ripped off. I suspect that is more down to the way the panel was anchored to the chassis though rather than the material itself.