Range Rover Sport: Restricted Performance issue!!

My Range Rover Sport 3.0TDV6 has thrown up a Red Triangle and a Restricted Performance warning. This means that the car is now operating in limp mode. Previous to this the car was indicating low battery in both keys eventually not recognising them at all shutting me out of the car. In this video I will explain the issues how they arose and the fixing of the key fob issue and what will be done to fix the limp mode problem. I used an icarsoft lr v3.0 for landrover/jaguar diagnostics tool and highly recommend it, here's a link https://amzn.to/3t8xlQz