I've posted this in Fitness & Health as it could save a nasty fall this winter. I still run too and from work even in the winter and the other day I was all over the place on the ice. So bought a pair of these on line - something like £6.50 including postage. They are designed to fit over normal shoes or trainers. Tried them out today to and from work on some pretty icy paths and they work a treat.
Falling on the ice is no fun so may be worth investing in a pair - they are general purpose not particularly for running in. In fact, I think running in them is going to wear the metal spikes out pretty quickly but at the price I am not going to grimble.