I know the ideal solution is a second set of rims, winter tyres and chains but we live in north Nottinghamshire so the ideal solution is overkill.

We don’t work so they would be more an emergency get us home than travel 100 miles.

Anyone any experience of them?

Don't bother. You can only use them on snow as they'll disintegrate quickly on tarmac.

Get some all season tyres and use them all year round... It's what I've done in SW Sheffield on the edge of the peak District and they've served me well in snow.