I don't know about the legal aspects of using them in the UK, you may be right. But your next comment shows how little you understood what I said.
The baker who delivers round here looked at the weather in the morning and when it turned really bad he invested less than 10 mins to put 2 studded tyres on the front on his fwd truck. As soon as the roads are clearer he whips them off again. There is no question of running with them on tarmac as you would have very little grip (by comparison to an ordinary road tyre) Horses for courses.