The Gresford Disaster occurred on 22 September 1934 at Gresford Colliery, Gresford near Wrexham, in north-east Wales when an explosion killed 266 men and boys. The cause was never proved but an inquiry found that a number of factors such as failures in safety procedures and poor mine management contributed to the disaster. Gresford remains one of Britain's worst coal mining disasters and mining accidents. Only eleven bodies were ever recovered.