Locks that work

............Maybe run some basic tests (twist/pick the lock/throw it at a wall) and if all is well add that motherfucker to the list of lists!

I'd been a little nervous to endorse products that arn't a well known brand, especially in security products, just incase they have some weird defect that makes them shite (and thus cheap)

Mechamorgan, thanks for the advice.

The GRP Superdeal U-Lock (18mm) that I just bought, is a tough lock. But being a mass-produced, cheap Chinese effort, it won't be as tough allround as an Abus for example.

I am easily aware of its plus points and its shortcomings.

Plus Points:
18mm, so won't be defeated by hand-cutting tools
Double-locking
Square-shaped, making it even harder to crop

Detriments:
Weak point would be the barrel/case, as its not as tight as it could be.
Attacks here would be more successful than against the u-shackle itself

Solution: Lock bike with keyhole facing away from easiest attack points, and exposing the very tough U-shackle.
Twin this method with an alarm lock.

This is how a £14.50 lock, can provide £200.oo worth of protection.

I did do my homework before buying. Its not a perfect lock, but the good part of it, is more than a match for the detrimental part. A bit of nous is called for though.