Most schools in England (not New England) are on Autumn Break from October 25 - Nov 2. We were at WDW last year during this time and the crowds were pretty heavy. Wait times for the popular rides were 120+ minutes

Almost everyone we met was from England which inspired me to do some research on exactly when their holidays land throughout the year. A great website, for anyone interested, is myschoolholidays . com. Also, Australia has breaks staggered between Sept 20 and Oct 12.
HTH