To be honest Tiompan you'd be wasting your time, because any amount of photos showing nothing at all will not convince the Faithful.

Ironically I think the very archive that would assist is actually in Swindon.
http://www.english-heritage.org.uk/professional/archives-and-collections/nmr/archives/ So of course this will already have been checked, before going public in a newspaper. Well probably. Not.

Secret knowledge, it's great isn't it. I know it's 3000 years old. I know it shows an owl and a spaceman. I know it was looked after by pagans for hundreds of years. No I'm afraid I can't show you the photos, they don't come out well in a newspaper apparently. Or now (as we're told above) we're not allowed to see them until the work's published (in which prestigious peer-reviewed journal I do wonder). You'll just have to believe me. Oh and if you're interested I've got a great second hand car you might like.