When I saw the first rumors on this story a few days ago I thought it was a hoax.
State schools isolate non-Muslims

Schools in Birmingham are illegally segregating pupils, discriminating against non-Muslim students and restricting the GCSE syllabus to “comply with conservative Islamic teaching”, an official report leaked to The Telegraph discloses.
….

The report, into three schools in the city, follows weeks of controversy over the alleged plot to “Islamise” secular schools in Birmingham and will lead to calls for intervention. The report focuses on Park View School and its sister schools, Golden Hillock and Nansen, the only primary of the three. Inspectors found that Park View practised forced and discriminatory sex segregation and has “restricted” GCSE subjects “to comply with conservative Islamic teaching”.

Core elements of the GCSE syllabus were missed out as “un-Islamic” and an extremist preacher with known al-Qaeda sympathies and anti-Semitic views was invited to speak with children. At Golden Hillock, there was discrimination against non-Muslims, the report found. Its handful of Christian students “have to teach themselves” in one GCSE subject after the teacher “concentrated on the students who were doing the Islamic course”.