I have had no trouble getting the bolts undone, the light unit seems free when pulled but something is catching, thats what made me think there was something else holding it in.
I am trying to be careful not to brake anthing as i still want to use the lights, its just i can't adjust the beam height. The chap i got the car off had different Head Lights fitted. He had the originals put back in but it looks like the linkage to the electric adjuster is not on properly, if i can get them out with a bit of luck i should be able to fix it.