I bung whatever I can in there. If I'm in an accident that's bad enough for tools to puncture the battery then I reckon that'll be the least of my problems.
Or 5 minutes or so if you've bolted on a pair of rangie seats like wot I dun. Hence, no, I don't store stuff unner there.
Don't get it neither, it's a Landy. It's not like it's a saloon with a wee glove compartment, why d'ya want to store stuff there, you've got a chuffing great load bay!