Volunteers and drones to survey sites at risk on British coast

Project will evaluate 5,600 miles of English coastline, where some 70,000 archaeological sites are threatened by changing sea levels or coastal erosion

A small army of volunteers, backed by drone technology, is being recruited to record and monitor the longest archaeological site in Britain: 5,600 miles of English coastline and tidal foreshore containing some 70,000 sites at risk of being destroyed by changing sea levels or coastal erosion.

The drones are being sent in as the safest and quickest way to survey large sites where there is little more than an hour of working time between tides.