So recently I have got the Quaternion rotations working, this has made my hud a lot easier to manipulate I have hence got the health bar working, it currently just cycles up and down from 100% to 0% and back but the principle is there.
I am now experiencing some flickering which I have to look into though, there's always something lol.
I have also started on a menu system when the game loads, I am pretty pleased with it so far even though it's not fully implemented, see screenshots
Health bar at approx 55%:
Health bar at approx 30%: