51�Թ�

Vlad Nikolin-Caisley, from Southampton, died in May last year, aged 17.

Vlad's parents Anna and Graham say inaction by the authorities cost their son's life.

Anna Nikolin-Caisley said her youngest child, Vlad, had been "encouraged" to swallow poison by users of an online "pro-suicide" group which is still active in the UK, despite numerous calls to ban it.

Vlad's family revealed the harrowing details of his death as a warning to others.

It also follows the death of 17-year-old Vlad Nikolin-Caisley, from the same city, in similar circumstances in May last year.