Prehistoric stone hunt under way in Devon salt marsh

Historic England is funding the excavation of a stone monument in Isley Marsh

A team of archaeologists is braving horse flies, spiky vegetation and murky ditches to hunt for mysterious standing stones lost beneath a West Country salt marsh.

The Yelland stone row at Isley Marsh disappeared beneath a thick blanket of silt after the closure of a power station changed the flow of sediment in the Taw and Torridge estuary in north Devon in the 1980s.