Depends on where you are though
Some teachers only went back for PD today, with the children returning Thursday. Some will be later than that!
It is very hard to say when schools go back nowadays, to be honest. It can vary from school to school, town to town and region to region. With the rise of academies, they can set their own holidays and PD days, therefore two schools, even a mile a part, can have two different term dates.
I believe this is part of the reason why Scarefest has been extended as Staffordshire schools are a week later than others.