Twenty schools and two councils in the Anglia region have joined the legal challenge to the English GCSE results.
Head teachers across the East are continuing their fight to have this year's GCSE English marks regraded
Mark Dawe, the Chief Executive of the OCR exam board, apologises for errors in the marking of last year's GCSE and A-Level papers.
Thousands of students across the region will be collecting their GCSE results later today.
This could be one of the last school years to take the exams as the government is looking at plans to scrap the qualifications altogether.
It wants to introduce what it says would be tougher tests more geared towards the workplace.