right, i have deduced that the previous owner must have taken the lights apart before and stuck them back together with some extra strong bathroom sealant - it looked like (and felt and acted like) the stuff that sticks my shower to my wall.
so basicly, after 15 mins in the oven at 150 degrees, the sealant didnt melt abit - whereas the plastics behind the lenses did

badly

however, all is ok
one of my mates has angels so i rang him to see if i could get his standards which he let me (legend love you aiden

) but i owe him a pair of standards urgently
anyway, took them home, put em in the oven at 150 degrees for
5 mins and they slipped away easily, no problems no hassle etc.
so i now have smoked headlights

will post some pics up later on the pics thread.