We will be moving to the Lausanne area in a few months with a 7 and 5 year old. Does anyone have experience of locals schools in Denens, Echandens, Cugy or Blonay. Is there a good chance that we'll find some other foreigners in the school(s).

There are several but you are quite late for admissions.

See sgisschools.com for a listing in vaud.

Try www.international-school.org for an English speaking primary school close to Vevey. There arte others but they might be able to help at this late enrolment point.