I know it's half term for the schools here in Leeds, but wondered if any
other European countries were on holiday, and thus how busy Chamonix would
be?

Netherlands (southern part) will start next week as well, nothern part will
be the week after. On saturday the 6th you can expect huge traffic jams in
the southern part of Germany, around Munich and some parts in Austria.
Donnow about France....

Marinus