Pam W wrote:

I think in general Land Rover have improved security on Defenders - the key and locks on newer ones are more secure and of course there is the factory alarm.

However, the basic design of the Defender is such that it is still relatively easy to break into, and so despite owners going to the effort and expense of a range of after market anti-theft devices they do still get nicked. For thieves the prize is worth the extra hassle and they find ways around them.