My headlights were pointing down on the road at the lowest setting. After a lot of searching on forums this site had the correct workshop manual. Through this I discovered that there are 2 sensors attached to the front and rear suspension. It turned out to be the front sensor where the bottom ball joint rubber seal had split which led to the ball joint seizing. This had then caused the bracket attaching the ball joint to the suspension to snap off. As a temporary measure I have freed the ball joint and covered it in grease and fabricated a bracket to reattach the original bracket. This has worked for now until I can get a replacement.