Doctors desperately tried to save Jonathan after he was taken to hospital – but tragically were unable to revive him.

The teenager of Bar Lane, near Wakefield centre, who lived with his mum Ann and dad Martin. It is believed he has a twin brother called Ashley.

Jonathan went out with an 18-year-old pal on Sunday afternoon.

The pair visited clubs in Leeds, including MyHouse, formerly Stinky's, Fibre and Mission before ending up at Space.

Det Insp Tim Hunt, of City and Holbeck CID, said that the two friends left Space during the early hours of Monday but they flagged down a taxi because the 19-year-old felt unwell.

The detective said they then went to Leeds Infirmary. "The 19-year-old was clearly in some distress and he was taken into the resuscitation unit but unfortunately he died within about half an hour of arriving there, at about 5am."

It is understood that Jonathan had taken ecstasy and had been drinking the liquid drug GHB during his night out.

GHB – gamma hydroxy butyrate – first appeared on the English club scene in the 1990s and became the substance of choice among clubbers as it was said to provide a stronger, longer lasting high than ecstasy.

The clear liquid was originally developed as an anaesthetic but was later condemned as too dangerous by doctors.
It can cause seizures and has been linked to drug deaths in the past.

Det Insp Hunt added: "There are those who go out drinking and taking drugs. Tragic circumstances such as this are a stark warning as to what can happen. This has been a tragic waste of a young life".

The dead teenager's friend, an 18-year-old from Featherstone, has been arrested on suspicion of possession with intent to supply drugs. He was released on bail pending further inquiries.

The family of the dead teenager were too distressed to talk to the YEP.

It is understood that they were contacted by the hospital after their son had been admitted and quickly came to Leeds.

It is not clear if they arrived at hospital before their son lost his fight for life.