THE director of a £10,000 a week rehab clinic that treated Amy Winehouse has been found guilty of a catalogue of failings.

Brendan Quinn, of Lewes, claimed to be “one of Britain’s 250 best private doctors”, but he was not even a qualified doctor.

Quinn was the director of the Causeway clinic in Essex, which treated celebrities including Mark Owen and Winehouse, who died in 2011.

A hearing of the Nursing and Midwifery Council (NMC) found that Quinn had allowed mentally ill patients to be provided with illegal drugs.

The clinic was not properly registered with the authorities, patients were not given proper psychiatric assessments and there was not always a fully qualified doctor on site.

While he was in charge, medication was administered by unqualified staff without valid prescriptions and drugs were stored in a suitcase in an unlocked room.

One patient, Channel 4 executive Sarah Mulvey, behind shows such as 10 Years Younger and How To Look Good Naked, took her life in January 2010 after she was treated there.

The NMC told Quinn: “Between around May 2007 and January 2010 you failed to ensure that the services provided at the Causeway were registered. On various dates between 2008 and 2010, you caused or permitted clients to be admitted to the Causeway and/or treated there who were mentally ill.

“You allowed clients to be admitted without ensuring that an adequate psychiatric assessment had been undertaken, a doctor was always at the Causeway, that they had tailored treatment plans, that they were adequately supervised or had adequate aftercare and allowed mentally ill clients to be provided with controlled drugs.

“You allowed and/or did not take adequate steps to prevent the storage of medication in a suitcase in an unlocked room in the Manor House.

“You allowed and/or did not take adequate steps to prevent the administration of medication to clients without there being a valid prescription signed by a doctor or nurse prescriber.

“You held yourself out as a doctor when you were not a doctor.”

The panel told Quinn that his fitness to practise was impaired by reason of his misconduct.

The 38-year-old registered nurse denied the allegations against him, claiming former staff members had cooked up elaborate stories to ruin him.

But the panel dismissed Quinn’s claims of an elaborate conspiracy, saying it “lacked credibility”.

Chairman of the panel, James Spencer, told Quinn: “The panel finds that holding yourself out as a doctor, in the way that you did, was dishonest.”

Quinn now faces being struck off from the nursing register.

He is expected to learn his fate on Monday, November 24.