We lived abroad for 3 years and came back in time for dd to start primary education. We have lots of friends who plan to send kids home for university education who are now facing up to 18000 pounds fees per year because the children have not been resident in the UK for the last three years.
Definitely something worth looking into if either you or your children want to do a university or college course of any type when you get home. Lots of info on ukcisa.org.uk.