During WW2 my maternal Grandfather was working a double shift in the middle of the night (to help the war effort) when he was injured underground by a rock fall causing crush injuries to his legs and back. His mates dug him out, brought him to the surface and stretchered him the mile-and-a-half back to his home. The doctor was called, meds given and an ambulance was called to take him to hospital in Durham ... he worked at Sherburn Hill Colliery near Durham City. My Grandmother had to pay the Doctor for the home visit and for the ambulance - it cost her two shilling and six pence. You had to pay for all this stuff when the pits were privately owned and there was no NHS. He got plastered-up and was back at work a couple of months later.