William Shanahan is a general adult psychiatrist and the Medical Director for the private services at the Priory Hospital, Roehampton. He is also one of the clinical directors of the Priory Group’s drug and alcohol services.

William studied medicine in Trinity College in Dublin, training first as a GP. He began his psychiatric career in the UK, in the Priory, in 1987 before joining the NHS. He trained at Charing Cross and was appointed a consultant psychiatrist to what is now the Central and Northwest London Foundation Trust, in 1992. William was the Clinical Director of their Addictions Directorate from 1995 until 2013.

For 19 years, he was Medical Director of the Nightingale Hospital in Marylebone, before re-joining the Priory Group. For 5 years, William was an honorary senior lecturer at Imperial College London, lecturing medical students on the subject of addiction.
He set up the first opiate treatment centre in West London and worked with the National Treatment Agency for Substance Misuse on the development of their models of care for the treatment of people with drug and alcohol problems. William has published papers on the subject and he continues to offer out-patient and residential care.