RAF Holbeach, now DIO Holbeach AWR is a Royal Air Force academic air weapons range (AWR) situated between Boston and King's Lynn near Gedney Drove End on The Wash, in Lincolnshire, eastern England. Most of the range, including the control tower and four observation towers (Quads) are in Gedney, but it does overlap with Holbeach to the west. On UK Civil Aviation Authority issued aeronautical charts the military Danger Area is found marked and identified by the code WRDA D207/II or the ICAO code EG D207 (Weapons Range Danger Area or United Kingdom Danger, 207, the danger altitude is usually up to twenty-three thousand feet AMSL).