though luckily we now have an option at less than a third of what Land Rover asks, which is a plug and play solution ;) check out my website for more info :)
and I can vouch that it works perfectly.
If you saw my thread here https://rangerovers.pub/topic/1024-ignition-tamper you'll know that I suffered interference to the keyfob receiver from a 433 MHz wireless central heating thermostat in our new house. Although it should have only sent a data burst every 10 minutes it turned out that it was faulty and sending a burst every 15 seconds so the BeCM was never going to sleep. Had I not had the ginormous Hankook battery fitted chances are it would have gone flat overnight. In fact, after not being used one evening so had been left for two days, the starter did sound decidedly sluggish when I next used it. If the car was left parked for any length of time the first press of unlock on the fob tried to lock the already locked doors, second press unlocked it. When turning the ignition on the message centre came up with ALARM TRIGGERED, followed by IGNITION TAMPER. If a door was left open for any length of time, after the interior lights had timed out and gone out shortly afterwards the dash would beep and display INTERIOR LIGHTS OFF, followed a few seconds later by IGNITION LIGHTS ON and it would continue doing this for as long as it was left unlocked with a door open.
I was sent one of Marty and Nick's prototype units to test. Although I replaced the faulty thermostat with a newer one operating on 868 MHz, I left the old one powered up so although it was no longer controlling the heating was still transmitting. My car was no longer affected at all and was back to normal, although I had to disconnect the battery on the SE and, as the Ascot came back from the extended loan to my boss, found that it was doing exactly the same as mine. So I had 3 cars, 2 without the unit and one with and the one with was the only one not being affected by the data bursts from the thermostat. So I can confirm it works perfectly and is also a 5 minute job to fit. Lift the panel to access the receiver on the car, unplug the cable to the receiver, plug the unit inline and put the cover back, job done and no more suffering from RF issues due to other transmissions in the area. Thanks lads, f*cking brilliant!