Can any of you photographic people tell me if this shadow on this guys right can be removed at all please using GIMP...this is only part of the photo but important thing is to know if it can be done and if so how please.

Well, I tried it with the clone tool, the healing tool, cut and paste and I did nothing but make a great mess. I know it can be done by one of the experts here though. The part on the side of the face where the days whisker growth is is very tricky.

Averaged color sample in neck shadow: value 109,109,109
Averaged color sample in neck light: value 189,189,189

Ratio: 109*255/189=147

Add white layer in "divide" mode above picture
Set FG color to 147,147,147

Paint white layer over shadow, the tough part is to get the border just right:

Very good ofnuts.
I tried it again, I cut out the shadow with the free select tool, pasted it on a separate layer, went to colors, levels and played around with that until it looked the same color tones. I moved it down to the shadow area and used the blur tool to smooth out the edges. I might have another go at it. The joins are still showing.

Me, I would paint the divide layer with a soft brush and/or airbrush (and a tablet if available). Nothing more needed. Image above is just a quick hack, so I couldn't take the time to get the border right.

ofnuts that was brilliant.

Just a little bit of math. In the same vein, I'm working on a procedure to remove semi-transparent watermarks.

haha, no, the process wasn't hard. I just would have never thought to do it like that.

Just a try; stuff like this takes a lot of tlc and I usually avoid doing these type of edits since I'm lazy. lol

very good Lyle