BONUSES at a Wembley school were “unlawful and irrational”, a Brent Council education boss told governors.

A report prepared in May detailing more than £600,000 paid to Sir Alan Davies, former headteacher at Copland Community School, on top of his salary has been leaked to every councillor in the borough.

The document, seen by the Harrow Times, also claims deputy head Dr Richard Evans was paid more than £300,000 on top of his salary over the same period, from 2004 to 2009.

The report was written at an interim stage in the investigation and the council has not yet published the outcome.

The leak prompted union rep Hank Roberts, who originally blew the whistle on bonuses, to renew calls for a criminal inquiry.

He said he is taking legal advice through teaching trade unions on the possibility of a private prosecution against the managers if the council does not press charges.

He said: “When are they going to reach a decision on whether to prosecute or not? They must be able to give some time frame. Do they think this is a crime or not?”

The council says it is seeking legal advice on what further action it can take against the staff.

Councillor Bob Wharton, responsible for children and families, said: “What is important is that we do things properly. Our job isn't resolving Hank Roberts' frustration.”

Brent Police say they have not received a complaint about bonuses at the school, but will investigate fully if they do.

John Christie, director of children and families, wrote in the report: “Funds which should have been used for the proper purposes of the school, and above all for providing education for pupils of the highest standard that the budget could provide, have been spent on what appear to be unlawful and irrational payments to staff.”

Sir Alan resigned from Copland in October ahead of a disciplinary hearing on charges of gross misconduct and Dr Evans was sacked in early November.

Two other senior managers have also resigned over the scandal, including bursar Columbus Udokoru and HR manager Michelle Bishop.

The report, sent to the clerk of the governing body on May 13, the day Sir Alan was suspended by the council, makes allegations about nepotism.

Gareth Davies, Sir Alan's son, was appointed at the school as were the ex-headteacher's son-in-law and sister.

The letter states: “In some cases the salaries paid to these members of staff appear to be excessive.

“Together, this tends to indicate that certain members of staff may not have been appointed on merit alone and, if so, such appointments could be in breach of the school's recruitment policies and procedures which are designed to ensure the best candidates are appointed to jobs within the school.”

The document alleges Gareth Davies, the caretaker, was paid £8,000 and £15,000 on top of his salary for work as project manager of a scheme to rebuild the school.