We are planning on hosting a group of British minors (15 years old) in Switzerland this spring. They will be flying alone to Italy where we will pick them up at the airport and drive them across the border to our home in Switzerland (and visit several places in both countries during their stay).
I'm failing to find any online resources that clearly state what are the legal requirements for this in those countries.
In case it make any difference, this are family friends; we know well both the children and their parents.