Before I started my gas fitting apprenticeship, I had a job as a coalman to earn a bit of money after college. This was also my winter weekend job until I could work overtime at 18.
If you can imagine trying to keep upright on sheet ice whilst carrying hundredweight sacks of coal on my back, well it wasn't easy. One of the lads on the yard saved my bacon by showing me the following tip, all you need to do is buy a pack of 3/4" ( 20mm ) hexagon head self tapping screws and screw 3 of them into the rear of each boot heel and they work like a charm. Just walk with a firm heel first lead and the hex head screws dig into the ice and you stay upright. The only thing to remember is take your boots off before you walk on your neighbours newly laid oak flooring, hope this helps. Cheers me dears.......