Starting problems - 1996 Discovery

New to the site & seeking some guidance !!

My Discovery has behaved perfectly over the past 8 years, but since xmas has been nothing but grief...

So far, due to starting problems, I have replaced the heater plugs,starter motor & battery - in addition, purchased a booster pack & new battery charger, all met with only limited success. Having replaced the starter and battery last Tuesday, she started (& drove) perfectly for five days until yesterday morning when ....nothing !! Turn the key & nothing happens.

Battery is fully charged, booster pack (also fully charged) does not have any effect...........

Any clues as to where I should look next - other than a new Landy !!!

Does it have the factory fit immobiliser? I suggest that it is either that at fault or the ignition switch.

Yes - it does have the factory fitted immobiliser, how do I confirm/resolve either way ?

The Definitive Alarm Spider Post - LR4x4 - The Land Rover Forum ....will tell you all

Thanks for the link - downloaded the info last evening. Looks fiddly, but do-able - task for this weekend possibly.......cheers