Stringer then worked for several months at Canonbury before being dismissed earlier this year after the row over the film screening came to light. He had been asked to run Canonbury's drama club by the then headteacher Jay Henderson, also from Hertfordshire, who was sacked this month after being caught watching pornography on the internet at work. Mr Henderson, 35, was also accused of presiding over a lax system of recruitment in which proper references were not obtained. There is no suggestion that he is involved in any criminal wrongdoing.