Ruth Kelly, the Education Secretary, is to back the appeal of a school found guilty of discriminating against a student for wearing strict Islamic dress.
Shabina Begum, 16, claimed a victory for all Muslims in March when she won a landmark Court of Appeal ruling that Denbigh High School in Luton had unlawfully excluded her for flouting its uniform policy by wearing a jilbab, which leaves only the hands and face exposed.
Miss Begum said at the time of the ruling that the schools decision had been caused by an atmosphere in which Islam was a target for vilification in the name of the War on Terror.
The Court of Appeal said that Miss Begums human rights had been infringed because she had been denied the right to education and to manifest her religious beliefs.