Dismissing Elizabeth Marshall's case, Mr Justice Sedley said he could detect no error of law in the Special Educational Needs Tribunal's decision that her son Jonathan does not need to attend the 110-pupil Storm House School, more than 100 miles from the family home in Earls Barton, Northants.
Jonathan has 'destructive and self-damaging behaviour patterns' and the judge said everyone agreed he needs '24-hour provision'.
But Northamptonshire CC says his needs can be met by a specialist
The mother's appeal against the county council's assessment of Jonathan's needs was dismissed by the Special Educational Needs Tribunal in September last year.
Mr Justice Sedley ruled that, although the tribunal's decision could have been 'better expressed', it had 'addressed the right issues' and had given adequate reasons for its conclusions.