A high-flying Channel 4 executive died of a drug overdose at her home in Hampstead, a coroner heard on Tuesday (December 6).

St Pancras Coroners’ Court heard how Sarah Mulvey, 35, was found dead at her home in Well Walk after overdosing on opiates following “two days of total crisis” in January last year.

Her father Dr Christopher Mulvey said his daughter had been “systematically bullied” while working at the broadcasting company.

Ms Mulvey was responsible for programmes such as Ten Years Younger, Brat Camp and How To Look Good Naked with Gok Wan.

The coroner interrupted Dr Mulvey’s testimony and said his daughter’s grievances against Channel 4 had been dealt with at a pre-inquest review and that it was not to form part of the inquest into her death.

Barrister Paul Spencer, acting on behalf of the family, said Ms Mulvey had believed she was “the subject of workplace bullying for over a year”.

A Channel 4 spokesman said Ms Mulvey’s grievances had been fully investigated and not upheld.

Ms Mulvey quit work and sought help at The Causeway Retreat on Osea Island in Essex, used by stars such as Amy Winehouse.

The treatment centre has subsequently been closed down following an inquiry by the Care Quality Commission, the inquest heard.

Coroner Dr Andrew Reid said the cause of death had been established as opiate toxicity and questioned where Ms Mulvey had got the drugs.

Her father suggested there was easy access to drugs at The Causeway and said his daughter had tried to hang herself before leaving.

The inquest was adjourned until early 2012 for further investigations, including into whether the clinic had access to prescription drugs which she could have stockpiled.