Problem Solved ! I got time to get the car on the Ramp before booking into Subaru. We found the rear link bar from the sensor to the tie bar had seized at one end. We took it off via the two 10mm nuts and had to kill the little rubber gator to get some releasing fluid into the ball & socket. Now the funny thing is that while its sitting in the vice it really didn't want to move and we thought it was scrap ! Untill the parts manager came along and put his lighter under it and "hay ho" it started to move. We got it moving nicely and surprisingly with no play in the joint, greased it up and now the lights adjust themselves how they should do.
Will get a new link ordered just because we had to kill the rubber gator.
I've got an extended warrenty on this vehicle but just to let anyone who wants to know if the sensor had gone, i was told there about £300 to replace !!!!! Weather thats porky's or not i dunno. I deal and work on Land Rovers. Only Drive Scooby's.
Regards
Nick