PHOTO LAMBTON HETTON AND JOICEY COLLIERIES RAILWAY AT PHILADELPHIA 1967 THIS WAS ONE OF THE MOST EXTENSIVE COLLIERY RAILWAY NETWORKS INHERITED BY THE NATIONAL COAL BOARD WITH A MAIN LINE RUNNING FOR SEVERAL MILES TO CONNECT A NUMBER OF COLLIERIES TO STAITHES ALONG THE RIVER WEAR.THE LOCOMOTIVES USED FOR MAIN LINE WORK WERE LARGE 0-6-2 TANK ENGINES LARGER THAN THE GENERAL RUN OF COLLIERY LOCOMOTIVES AND VERY SIMILAR TO ENGINES USED ON MANY OF THE PUBLIC RAILWAYS IN SOUTH WALES.