TEMPORARY ROUGH NOTES:
Looked at HUD tutorial by Shad:http://www.shad-fr.com/udk/hudtut/english.html
Tutorial works with vehicle health in game - stripped down the code to only include relevant pieces for the game, needed help from forums and got some helpful feedback - pity the bedroom programmers also feel compelled to have an elitist attitude while dispensing information
Eventually got HUD to work though the gauge is co-ordinate specific, not screen percentage, so window cannot be resized during play unless a solution is found.
Terrain work started, issues with vehicle collision and handling. Cannot drive on uneven ground and this is a MAJOR problem for the development of the whole project. Tweaking vehicle handling cause more problems to which a solution is yet to be found.
Have posted on UDK forums about this but feel a bit halfhearted after the snobbish response from the coders.