2001-2009 I worked as a teacher in UK 'estate' schools.
Abingdon, Oxford, Bodmin, and assorted Cornish mining town schools.
These schools were rife with gangs, violence, drugs, in fact they were so bad they often couldn't employ regular teachers, but needed to employ specialist people like me who were employed to work more as 'prison guards' than educators.
If you return to the UK without enough money to live in a catchment area for a good school, your kids will end up in the sort of school I used to work where the education was realistically non-existent