I have now found out and been able to fix it, it appears all that is needed is a NanocomThe truth is with this thread, a few of us know what you need to do.. However none of us are going to tell you. Not to be rude.
With the high amount of thefts of defenders, this topic isn't something that people will want public or to help random new members. I hope you can understand the context of it; New member joins; Asks about stolen immobilizer questions.
The advice I would give is to take it to a land rover specialist.
But hope you're genuine and welcome to the community.
While I do understand you not helping a new member it was to be honest rude and asking for a vin number is that a joke?
It looks like the land rover security system was put in to basic or base mode so that it was just working with the key or be it the screwdriver so when the power from the battery was removed by me it reset the system.
Now having used the Nanocom I was able to change it back to normal but it does show how weak the security is unfortunately so I am going to look in to adding some extra security to the vehicle.