A troubled academy network called in police after an open letter was given to parents at its school gates condemning two senior members of staff.

Parents collecting their children last week at three Cuckoo Hall Academy Trust schools received two letters criticising the leadership of Cuckoo Hall Academy Trust executuve headteacher Patricia Sowter and Cuckoo Hall headteacher Sharon Ahmet.

Both were suspended in November 2014 by former chairman of governors Andry Efthymiou but the suspensions were lifted following the outcome of two external investigations.

The letters were circulated at Cuckoo Hall Academy in Cuckoo Hall Lane, Kingfisher Hall Primary Academy in The Ride and Woodpecker Primary Academy in Nightingale Road.

Both letters are anonymous, and the trust was quick to counter with a letter of its own, issued to pupils on March 19, lambasting the messages as “malicious” and saying that police are investigating.

A spokesman for Cuckoo Hall Academies Trust said: “It is absolutely disgraceful that these people should seek to distribute this kind of distressing material to parents in this way – especially at a time when young children are leaving school at the end of the day. We are grateful to the police for their swift action.

“Staff at the trust are working incredibly hard to move forward following the EFA report and are dedicated to providing a high-quality education to some 1,700 pupils at our five schools. 

“It is enormously sad that a tiny minority of people are continuing to seek to threaten the quality of education provided to children. We hope they will move on and desist so that our staff can be left alone to teach and so our children can be left alone to learn.”

A parent, who did not want to be named, revealed their anger at their daughter’s homework being marked incorrectly at the school.

He said: “They have marked it as 100 per cent yet I can see three or four errors. They are only doing it to boost stats and I am seriously considering taking my child out of the school because it is going downhill.”

Last week Enfield North MP called for senior members of staff to step down after the resignation of two headteachers: Matthew Laban at Kingfisher Hall and Alison Edmonds at Woodpecker Hall Academy.

In his letter, seen by the Enfield Independent, he said: “It is clear to me that this leadership team do not carry the confidence of the parents and should resign to be replaced by a new board.”

The MP revealed he was disappointed in the DfE report and that it had not done enough to remove the current trustees.