Crank no start

Hi everyone, I've got a 2008 Land Rover Freelander 2 TD4 S. The new battery ran down after not starting for a week and when I tried to start the car, after charging the battery, it was just cranking but not starting. The orange information triangle flickered on with hazards also on and "HDC fault system not available and transmission fault" indicating on display. I've pulled and checked all the fuses and swopped relays around but no joy. It did start at one stage and ran for a couple of seconds but then died again. I also cleaned the crank sensor and checked diesel supply through filter and at injectors. Could you please give some advice. Thanks in advance.

Is the battery suitable for the vehicle? The Freelander 2 is very power hungry, so needs a battery that is up to the task.
Hazards coming on suggest the battery voltage has dropped below 8 Volts, which puts the vehicle into crash mode. The HDC warning on the dash also only appears with a failing or weak battery. An additional earth lead from the battery negative terminal to the starter mounting bolt is a worthwhile addition, as the factory earth lead can fail to carry the current needed for fast starter operation.
You need to eliminate the battery issue first, then move on to solving the lack of starting, if getting the battery up to scratch doesn't solve the problem..