Mr Fred Collindridge (left) and Mr Ernest Jones - Yorkshire area Secretary of the National Union of Mineworkers arriving for the National Union of Mineworkers' Officials at the Ministry of Fuel Offices in London. They met to find a solution to the problem set by the miners and Grimethorpe Colliery who refused to work the extra coal-face has led to sympathy strikes in 49 of the Yorkshire coalfields. 5 September 1947