The Winter Hill air disaster occurred on 27 February 1958, when the Silver City Airways Bristol 170 Freighter G-AICS, operated by Manx Airlines on a charter flight from the Isle of Man to Manchester, England, crashed during heavy snow into Winter Hill, 5 miles (8.0 km) southeast of Chorley. Thirty-five people died and seven were injured; the cause was determined to be navigational errors.