Q&A: GCSE English legal challenge

As the High Court rejects an attempt to overturn controversial English GCSE grades, the BBC News website looks at the background to the controversy.

What was the judicial review about?

What was the case made by the teaching unions, local authorities and pupils?

What case did the exam boards make?

What did exams regulator, Ofqual, say in court?

What was the court's verdict?

What role has the government played?

What was different about this qualification?

What about other parts of the UK?