Squid -- this is not a breakthrough at all. This site has been known about, and described, for many years. The only "discovery" (if that's the right word) is that there may be something beneath the burial mound. What that is, and what its significance may be, is still be be established. There is NO link here with Stonehenge, whatever the two professors may say. So please don't just accept the nonsense trotted out in the "Digging for Britain" programme -- it was slapdash TV journalism at its worst..