Thanks for the advise.
Not sure a rim width I've got the spare in the workshop at the moment, just trying to get the split rim off.. lol (grumble)
Because of the weather we get in the UK, you can have 1-4" of snow through the day, for it the almost melt and then freeze before daybreak. For more snow the fall. Narrow tyres tend to cut through to the ice underneath and you end up going nowhere.