Considering they're so prominent, and obviously sacred I'd have thought, and geologically the oldest part of England (I read somewhere) the Malverns don't seem to feature very prominently here.
EH have recently done some work on them (see their site, search on Malvern) and it seems that part of the earthworks, Shire Ditch, is much older than previously thought (Rhiannon posted a news item about it).
That being so, I reckon someone with strong legs ought to get up there and suss it all out and post some pictures...
(Take a packed lunch, and NO eating the mushrooms.)