It is definitely a spark issue, whenever it wont run there isn't any spark. When it dies it is just like you flipped off a switch, not very common for fuel starvation.
I cleared the codes, as of this instant the high voltage code hasn't returned. My scan software doesn't support Land Rover enhanced coverage, so I'm pretty well screwed when it comes to troubleshooting this through the computer. I'm not familiar with this OHM meter trick, please elaborate.