Hadrian's Wall being damaged by "nighthawk" metal detectorists
Archaeologists from the Historic England conservation group have called on visitors to report illegal treasure-hunting to the police after more than 50 holes were discovered on a section of the site.
Mike Collins, Historic England's Inspector of Ancient Monuments at the wall, said so-called "nighthawk" clandestine detectorists are "breaking the law and robbing us all of the knowledge and understanding that objects from the past can give us."
The wall has long been prone to damage. Conservation efforts only began in the 18th and 19th centuries after centuries of stones from the wall being stolen for the construction of castles and churches.
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