A scheme to protect Dartmoor's ancient artefacts from thieves is to be expanded.
Ancient crosses have been disappearing from the moor
The project which uses electronic tags to make items like granite crosses less attractive to criminals is to be used more widely across the South west.
Security measures were introduced after an attempt to remove a granite cross on the moor last year.
Placing a microchip about the size of a grain of rice into the artefact means pieces that are stolen can be traced.
More items are now being tagged and the scheme has been so successful that a similar project has been introduced in Cornwall.