that is very easy, and it is shown in the U.K. owners manual, just loosen the 3 screws on the rear of the headlights, turn the reflector to left hand drive position, tighten screws.
go to my website, http://twrite.org/shogunnew/topmenu.html
on the left click
new & updated
click 08/06 German owners manual, a new page will open and there is also a 1988 U.K. owners manual, download that page 45