sorry i have no experience myself of this but having lived as an expat in various countries i know people who were in similar situations so here are a few suggestions: -do A levels by distance learning, takes some committment, maybe hire a local tutor to help and attend summer schools or tutorials back in the UK -go to an international school as a weekly border, I believe there is one in Bordeaux which wouldn't be too far away -there are state boarding schools in the UK which you only pay for the boarding aspect not the schooling. therefore much cheaper than normal boarding schools, would probably be coming to visit every 6 weeks the way school holidays work out. What are your sons prioreties ie, staying together, getting good education, socializing with mates hope you come to the best decision