Gordon Hillman has pulled out, but this has opened up some slots:

Semir Sam Osmanagich: Pyramids, megaliths and temples in central Bosnia.

Philip Coppens: The origin of the famous Mitchell-Hedges crystal skull.

Saturday evening: Dirk Campbell, Ed, Will & Ginge : Special musical event – Ancient musical instruments/folk songs from ancient Britain.

Sunday evening : John Michell – Megalitho-Forum.
See the website for details of the full line-up.