A head teachers’ union is set to consult its members on potential industrial action after its High Court bid to challenge Ofsted’s new school grading system was dismissed.
The High Court ruling, delivered by Mr Justice Saini, found that Ofsted’s decision to adopt the new framework was reached "after a detailed consultation conducted in a procedurally lawful way".
This dismissal comes as Ofsted prepares to implement its new report card system on 10 November, having scrapped single-word judgments for schools earlier this year.
Barristers representing the union and Ms Middleton had argued that Ofsted’s prior consultation had "ruled out" the use of "narrative-only verdicts" for schools.
They also contended that the new framework failed to adequately consider the impact on staff wellbeing.

Responding to the judgment, NAHT general secretary Paul Whiteman expressed his disappointment. He confirmed the union would now proceed with consulting its members regarding industrial action following the court’s decision.
He said: “The decision today doesn’t detract from our valid and reasonable concern about the damage to the mental health and wellbeing of school leaders and staff of the new report cards.
“This is an acute and basic health and safety issue recognised by an independent report commissioned by Ofsted itself which has not been dealt with at all.
“Both Ofsted and the Government have failed to address the very real risk posed by the new framework to school leaders.
“We will now consider an appeal and will be consulting our members on industrial action.”
Ofsted scrapped single-word judgments for schools after criticism of the inspection system following the death of head teacher Ruth Perry.
It launched a consultation in February this year and announced the new report card scheme in September.

Under the scheme, schools will be given one of five grades – urgent improvement, needs attention, expected standard, strong standard and exceptional – in each of six areas, with reasoning provided for each grading.
A pass or fail grade will be given in relation to safeguarding, with inspections paused since September 1 to allow education providers time to prepare for the new framework.
A poll by YouGov found almost seven out of 10 parents surveyed preferred the new-look report cards to Ofsted’s current inspection reports.
In court on Monday, Hugh Southey KC, for the NAHT and Ms Middleton, said there was “at the very least an appearance of pre-determination” in Ofsted’s consultation and the watchdog had “rejected” the “key option” of narrative-only verdicts.
The barrister continued that the National Education Union and the Association of School and College Leaders both supported the legal challenge, stating: “All three of these unions believe that narrative-only verdicts are the correct way forward and they are the correct way of safeguarding wellbeing.”
Sir James Eadie KC, for Ofsted, said in written submissions that it “vigorously opposed” the “weak” claim, telling the court that the new scheme was a “considerable upgrade in terms of wellbeing”.

He said: “Ofsted considered, carefully: the wellbeing and workload implications of the five‑point scale; the relative merits of the narrative approach and other grading schemes, including on wellbeing grounds; and the reforms necessary to reduce workload and promote wellbeing more generally.”
In a ruling, Mr Justice Saini said: “It is for Ofsted to decide how to conduct its inspections in the way which, in its expert judgment, is most effective, while taking account of the risk to the wellbeing of teaching staff and leaders.”
He continued: “The evidence satisfies me that Ofsted’s conclusions, that a grading plus narrative approach best balances the different interests at play, was reached after a detailed consultation conducted in a procedurally lawful way and after a careful assessment of the various views expressed to it, including consideration of wellbeing issues.”
Sir Martyn Oliver, Ofsted’s chief inspector, said following the ruling that he was “pleased” with the outcome, stating the changes would help to “raise standards of education for all”.
He said: “I have every confidence that headteachers will recognise the changes are fair, that inspection takes staff wellbeing fully into account, and that the whole experience is collaborative and constructive.”