immobiliser woes

[TVRNick]

My V8S is fitted with M1600 immobiliser by Micro Scan Security Products
It has recently started to play up, randomly not allowing me to disarm and start the car

Does anyone happen to have a wiring diagram or installation instructions a I want to remove it entirely

or can anyone recommend an immobiliser installer in my area Ludlow SY8

[TVRNick]

Thanks guys appreciate all the advice