The boss of a celebrity rehabilitation clinic where stars including Amy Winehouse and Jonathan Rhys Meyers were treated is facing a ban for falsely claiming to be a doctor.

Former nurse Brendan Quinn co-founded the Causeway Retreat in Essex, England in 2005 and it attracted several big-name clients, including Take That singer Mark Owen.

The $16,000 (£10,000 )-a-week clinic closed in 2010 and bosses were ordered to pay $60,800 (£38,000) in fines and costs for treating patients without obtaining a proper licence, and now Quinn is facing a rebuke from a medical governing body for a string of misconduct charges.

After a lengthy inquiry, officials at the Nursing and Midwifery Council in London ruled Quinn had left drugs in an unlocked room, failed to properly supervise patients, and was named as one of the U.K.'s best private doctors in advertising material for the clinic, when he was not even qualified.

Quinn, who had denied all the charges and claimed they were based on lies by former members of staff at the clinic, is due back before the panel on 24 November (14) when a decision will be announced on his fitness to practice.