FOR centuries the King's Knot has had experts in a tangle trying to explain its mysterious origins. Theories about the earthen mound below Stirling Castle include an Iron Age structure, a Roman fort and even the Round Table where King Arthur gathered his knights.

But now, the latest scientific techniques will be used to probe a metre beneath the ground to get a clearer picture of the enigmatic site. Stirling Local History Society (SLHS) and Stirling Field and Archaeological Society will join experts from Glasgow University Archaeology Department next week to conduct a geophysical survey of the entire area.