Thanks for replying, Graeme. I charged my battery with a Ctek 5A charger for a day and it came up to 12.92V. Still no change. I do have another car and jumper leads and I'll try your suggestion later.
I also connected my Bosch C7 battery charger which has a power supply feature to the leads and disconnected the battery (to take it out of the picture, in case it's bad) and still no change.
I also removed the battery from the bay and arranged all wiring, pushing connectors to ensure they firmly connected. The battery has 12V on it, disconnected from the car. I hooked up the battery again. I also found a grounding point in front of the battery with 2 wires on it. I loosened it, cleaned then re-tightened. With fingers crossed, I hopped inside the car only to be frustrated because all of that didn't change anything.
I pulled out both A pillars but did not find any earthing connection there.
I do have a voltmeter. How do I check if it's a positive supply problem or an earth problem on the fuses?
I started the car a few times today placing the smart key in the raised ridges under the steering column with no problem. Engine easily cranks, then starts. The display in the console (with the, LR4 image, coolant temp, fuel gauge, etc.) came back a couple of times so I was happy thinking that it might be the start of something good. But after I stopped the engine and re-start, it's gone again.

