Winter tyres approved for a maximum speed lower than that of the vehicle may only be fitted if;
1. The maximum speed of these tyres is displayed in full view of the driver, e.g. on a clearly visible sticker on the dashboard, and;
2. The maximum tyre speed must not be exceeded.
Exception: Rule 1 does not apply to the UK.
Obviously, if one were to drive to the Continent on such tyres, it would be wise to be prepared and obtain a sticker beforehand.