A 14-year-old girl left alone to self-harm at a mental health hospital when she should have been under constant supervision was unlawfully killed, an inquest jury has concluded.

Ruth Szymankiewicz was being cared for by a member of staff on his first shift who had fake ID at Huntercombe Hospital, near Maidenhead, Berkshire, on 12 February 2022.

Ruth, from Salisbury, was unaccompanied for about 15 minutes and left alone to walk around the hospital and to her room.

It was there that she was found unconscious shortly afterwards. She died at the John Radcliffe Hospital in Oxford two days later.

She was being treated for an eating disorder when she was moved to the failing hospital, which has since shut down, from October 2021.

It was rated inadequate and later requirements improvement in two separate inspections by the Care Quality Commission (CQC) in 2021.

The jury found contributing factors to her death included insufficient training of staff and that her care was “not suitable nor conducive” to helping her recovery.

She was also not prevented from watching “harmful material” online. Visiting arrangements in which only one family member could visit her at any time were also a contributing factor.

Her parents, Kate and Mark Szymankiewicz, a GP and surgeon respectively, made a statement outside Buckinghamshire Coroner’s Court in Beaconsfield.

Mr Szymankiewicz said his daughter was an “incredible, bright, friendly, loving and adventurous girl with a whole life of joy ahead of her”.

He added: “When at our most vulnerable as a family we reached out for help.

“We ultimately found ourselves trapped in a system that was meant to care for her, to help her, to keep her safe and instead locked her away and harmed her.”

Ruth’s mum added: “There is an empty space at our table, a silent bedroom in our home and a gaping hole in our family that will never be filled.”