Best security devices to lower insurance

What type of security devices tend to bring insurance quotes down?

Im all for making my land rover thief/ vandal proof :darth_vader:

Don't know about insurance but a long running survey here of attempted and stolen LRs suggest a steering wheel disklok is the single most effective deterrent.

For the best chance to get a LR back (and probably reduce insurance) is a tracker. Ryder is the chap to talk to about trackers

Thanks!