Teachers at a school embroiled in a row over uniform rules which are claimed to discriminate against Muslim and black students have threatened industrial action and “overwhelmingly passed a motion of no confidence” in its principal.

Scores of pupils at Pimlico Academy in Westminster, central London, chanted “we want change” and walked out of school early on Wednesday in protest against the school hierarchy. Police officers were seen at the school grounds during the protests.

The Education Forum’s Alka Sehgal Cuthbert told talkRADIO’s Ian Collins: “I’m not against a bit of protest in the right place… what we’re seeing here shows a deeper problem of adult authority, teachers authority in particular.”