'Chemsex' drug: 'I felt so ashamed'

A trend for drug-fuelled sex parties has emerged in parts of London's gay scene.

One of the drugs being taken is GHB.

It increases the desire for sex and reduces sexual inhibitions but it can also make users fall into a coma and is known to have caused a handful of deaths.

Zia tells the BBC's Mobeen Azhar about his experiences using the drug.

Hear the full programme on The Report on BBC Radio 4 on Thursday 2 July at 8pm.