Jay Slater’s post-mortem and funeral will feature in a new Channel 4 documentary that will look into conspiracy theories surrounding the case. 

The Disappearance Of Jay Slater will follow the story of the 19-year-old who vanished in Tenerife last June – only to be found dead a month later at the bottom of a ravine on the Spanish party island.

The film, which has been made in collaboration with Mr Slater’s family, will include exclusive access to his post-mortem and funeral.

It is also set to look at the conspiracy theories that stemmed from the story, the online abuse that the family still receive and the media coverage of the case.

Mr Slater’s disappearance last summer sparked a global internet storm – with armchair detectives sparking wild theories as to what happened to him.

Rita Daniels, Channel 4 commissioning editor, said: ‘The story of Jay Slater captured the nation last summer with a fervour and intensity fuelled by armchair detectives and internet culture.

‘We are so glad to be working with Anna on a sensitively handled exploration of the family’s experience, and understanding the impact of being in the middle of a social media storm, amplified by grief.

‘The film holds a light up to our current society and is exactly the story that is a necessity for Channel 4 to tell.’

Apprentice bricklayer Jay Slater, 19, pictured with his mother Debbie Duncan (file picture)

Jay Slater called his friend Lucy Law (pictured together) in June last year saying he was lost

The coffin of Jay Slater ahead of his funeral in Accrington, Lancashire, on August 10, 2024, where mourners wore the colour blue in his memory

Produced by Candour Productions, it will also look at the world of online armchair detectives and the consequences of their actions.

It comes after celebrity investigator Mark Williams-Thomas last week revealed the first full witness account from the last person to see Mr Slater alive.

According to the extraordinary new account, the 19-year-old armed himself with two knives and stole a bag of ketamine before fleeing an AirBnB on Tenerife.

Mr Williams-Thomas found that those around Mr Slater on the night he disappeared spoke of him having taken a cocktail of drugs that left him ‘on a mission’.

Extraordinarily the TV investigator managed to track down two key witnesses in the case – just a month after the coroner officially appointed to investigate Mr Slater’s death expressed exasperation that the police had been unable to find the same pair.

Those witnesses include Ayub Qassim – the man who the apprentice bricklayer from Oswaldtwistle, Lancashire accompanied back to an AirBnB after staying up all night on drugs following a music festival.

Convicted drug dealer Qassim, 31, is understood to be was the last person to see the apprentice bricklayer before he vanished in mountains high above the village of Masca and had been due to give evidence at his inquest last month but the coroner said he could not be traced.

Jay Slater pictured with friend Brad Hargreaves (left), with whom he was on holiday in Tenerife

Mr Williams-Thomas previously revealed the alleged difficulties he faced when dealing with the police in Tenerife

Jay Slater’s mother Debbie Duncan arrives at Preston Coroner’s Court in Lancashire

In the two part podcast called Jay Slater The Investigation, Williams-Thomas underlines how Qassim served a nine-year jail term after being convicted in 2015, following the smashing of a plot to flood the streets of Cardiff with Class A drugs.

Speaking to Williams-Thomas, Qassim describes how he had picked up Lucy Law and two friends Bradley Hargreaves and Brandon Hodgson, and they went to look for Jay after she had contacted him on social media.

In the podcast, Williams Thomas says: ‘What Qassim said next was really significant and I believe provides real context to a very number of important aspects of this case.’

Qassim tells him: ‘They were just doing my head in, one said. ‘That’s the two bottles of Henny [Hennessy cognac], they were just doing my head in.

‘In the end I just turned to Brandon and said:’ Look Brandon, one of your mates, yesterday walked way because he’s f**** off with the ket [ketamine] and he want missing. Tell this f****** idiot to get back in the car.’

Williams-Thomas says: ‘So, let’s just re hear that again,’ before playing the clip once more, and then adding:’ I believe this is really significant new information.

‘When Qassim said ket, he was referring to ketamine and my information is that this drug was readily available and that Jay had definitely been using it.

The Airbnb house in Masca, Tenerife, where Jay Slater was staying before his disappearance

Search and rescue teams hunt for missing Jay Slater last summer

‘I have further information about the supply of ketamine into the country, in the UK ketamine is a class B drug carrying a maximum of five years sentence for possession and 14 years for supply.’

Williams-Thomas adds: ‘So, Qassim says in the recording that Jay left the rental on the morning and took with him Qassim’s ketamine.

‘If you wonder why we’ve not heard this before, his police statement of course made no mention of this.

‘My intelligence, however, is that the rental location was specifically chosen so as not to being attention to nay illegal activity.’

The release date for Channel 4’s new show is yet to be announced.