Jaguar Repair: series 3 rear quarter light removal, marker light, side marker

Question
I have done everything that the factory manual says and up to this point the
glass is slightly loose (or more accurately the framing around it is slightly loose)
but I still am not able to remove it. Perhaps I am being a bit too gentle? Any
ideas, tricks , tips greatly appreciated! Thank you for sharing your vast
knowledge with us!

Answer
First Tonie, what are you calling a "quarter Light"?
If you are talking about a "Side Marker" light it only has one small screw holding the lens on and it is not glass it is plastic. If you are talking about the chrome piece that the lens attaches to, it is held in place by two small nuts accessible by removing the tail light assembly. If this is not how your side marker light is held on then you don't have a series III Jag. The only other option is that someone has replaced the side marker lights with some other brand car's lights. Let me know,
Howard