Context
Risley sits near Warrington, in Cheshire. In 1956 the United Kingdom Atomic Energy Authority took over part of the former Royal Ordnance Factory at Risley Moss, and by 1970 the UKAEA site employed 4,500 people. On 17 March 1978 Ken Edwards, a 39-year-old service engineer, was making the 15-mile journey home to Warrington after a union meeting in Greater Manchester. His van carried a radio transceiver. The road ran beside the nuclear facility.