Hello,
Here just an advise….
as of the current weather situation, you will have to be very careful choosing a location which is not in the mountains ! Which country can give you the garanty of ice in Europe without being in high mountains ? – honestly not sure. The location will have to be in high alttitude to be on the safe side with the ice. I have scouted few years ago in Czech republic and Poland for a lake with ice for a big film and honestly Poland only could give us the garanty….Go as much north and as much high (and still be flat) as possible. A very cold winter is predicted so you have a good chance to find a right place – Good luck ! Jasmina