Locks that work

Lock picking is not the main threat from my totally unscientific analysis(*). If it were in the same league as the old bic pen Kryptonite flaw where any chancer could do it in minimal time then it would be much more serious.

Still, it is useful I think to point out that locks can be picked and that if someone were to pick the lock, it doesn't matter how much metal is in the shackle. I'm not sure what the best defence against lockpicks is - a good lock mechanism (hard to judge), several locks with different mechanisms, parking up in a visible place where anyone picking is more likely to be disturbed or not using a lock.

Agreed. I can not see someone hanging around in public trying to do this with some form of alarm screaming (I use an additional alarm padlock with mine). I could see this being more of a threat of them using it on my bikes in the shed, if they have targeted me.

Easy to carry some pick devices and a torch, than a portable angle-grinder.

As ever, prob me just being paranoid.

... which prompted me, after reading this thread a few weeks ago, to buy some 19mm chain - dooh' I should have realised how heavy it is. LOL. Feck me, locking my bikes up with 3m of that is a right old exercise work out. Like dragging the Titanic out by the anchor chain.