The figure backed up a lurid picture painted at an employment tribunal of attacks on teachers and pupil violence running out of control at the north London school.

But since Trevor Averre-Beeson became head-teacher four weeks ago, the number of exclusions has dropped to precisely none.

He has introduced reward schemes where pupils can win cash prizes for good behaviour and attendance and has set about painting the entire school “restful” lilac and green. Unruly pupils are sent to an internal exclusion room where they work under supervision. Real exclusion from school is considered once a pupil has three referrals in a set period.

Mr Averre-Beeson, 42, said: “Last year there were 365 exclusions. It was using up a lot of staff energy and resources and disrupting the education of a lot of youngsters. The three-strike rule means youngsters can make a choice to behave. Sanctions contain behaviour. Rewards change behaviour.”

In March a former teacher told an employment tribunal of the “culture of violence” in which she was assaulted twice while pregnant.

But Mr Averre-Beeson said: “The picture painted at the tribunal was not one I recognise. I have found a normal, calm, well-ordered environment.”