I let the National Trust know as soon as I saw what was going on (the drums, flags and goose step gave a little away).
I doubt Fleet Street will understand how significant this is ... or indeed the NT ... the Goose Stepped into Avebury without informing the National Trust.
Was it a belated Hitler birthday bash? An early St George's knees up? If this had been Stonehenge I suspect CNN would've picked the story up.