Everything we know about two mystery men Jay Slater left festival with before he disappeared

The last two individuals known to have been with the missing teenager Jay Slater in Tenerife have now returned to the UK.

Jay, an apprentice bricklayer from Lancashire, had been enjoying festivities at the NRG festival before he ventured to an Airbnb accommodation situated north of the island with the two unidentified men during the early hours of Monday, June 17. His companion, Lucy Mae Law, who accompanied him to the Canary Island and shared accommodation near Playa de las Americas, reported that Jay had encountered the men after the three-day event.

These men, who apparently did not participate in the festival, had rented a car for convenient travel around the island and to their secluded holiday home, which is perched just outside the hamlet of Masca on the mountainside within the Rural de Teno national park. The cottage is where Jay was last seen; the property owner, Ofelia Medina Hernandez, recounted telling Jay the schedule of the next bus after he missed the previous one.

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However, Jay decided to proceed by foot, and Hernandez described him as "walking alone, and fast". Before his phone battery dwindled to one per cent, Jay managed to call Lucy shortly before 8am on that ill-fated Monday, informing her that he was lost.

Reflecting on her friend's vanishing, Lucy has since stated in interviews: "He's gone on a night out, he's gone to a friend's house, someone that he has met on holiday.", reports the Manchester Evening News.

"One of the people he has met has hired a car out of here, so he's driven them back to his apartment and Jay has gone there not realising how far away it is. He's ended up out in the middle of nowhere. Jay was obviously thinking he would be able to get home from there. But then in the morning he's set off walking, using his Maps on his phone and ended up in the middle of mountains with nothing around. He rang me at about 8 o'clock morning saying his phone was on 1 percent."

She added: "He said 'I don't know where I am, I need a drink and my phone is about to die.'" The young woman managed to locate the Airbnb on Monday after using markers in Jay's last Snapchat image. She approached the two men who were still inside the property.

She said: "We managed to find the house. I knocked on the door and there were two people there."

The occupants told Lucy how Jay had gone out for a cigarette before going back in and saying he wanted to go home. "They told me he'd spoken to the next-door neighbours and they'd told him there was a bus every 10 minutes back down to Los Cristianos," said Lucy.

"The bus stop was right next to the house. So obviously if he'd gone to get the bus he wouldn't have got lost because it [the stop] was visible from the front door."

Lucy continued: "The two boys that he was last with have left the country."

More recently, a leading investigator, who worked on the disappearance of Nicola Bulley, has flown in to help Jay's family locate their son. Former detective Mark Williams-Thomas has once again highlighted the two men, labelling them as "key witnesses."

He characterised the men, believed to be from Luton, Bedfordshire, as in their 30s or early 40s. One of the men is reportedly around 6ft tall with short dark hair. There is no implication that either are guilty of any misconduct.

One is known by the nickname Johnny Vegas. Mark has cautioned that he will disclose an image of one of the men if they decline to assist with the investigation.

The detective added: "The family have provided me with an in-depth insight into what has happened in the hours leading up to his disappearance. I have, so far, been able to converse with a large group of witnesses. But there are two key individuals to date that I have not spoken to. These are the two men that took Jay back to the holiday rental in the hills. Those two men have communicated with the police and they are now back in the UK."

Providing more information about the two men, Mr Williams-Thomas said: "They didn't attend the festival - they didn't have tickets. There will be you, along with many other people, asking very pertinent questions into why were they here, what were they doing, why did they take Jay back to that holiday rental? ".

When questioned about his thoughts on the Spanish police permitting the two men to leave the island, he frankly stated: "I think the problem is the starting point of the investigation for the Spanish authorities has been one of a missing person. If this was in the UK I would have started investigating it as a critical incident and I'd have done everything so that you can secure the potential crime scene. Once you've lost evidence you've lost evidence."

His views mirror those expressed by a Tenerife native known only as Araceli. She works next to the rental accommodation used by this duo.

Sharing her observations with the Mirror, she revealed: "I never saw the missing boy, but I know people saw him walking on his own. I saw the two British men who stayed here. They came in for cafe con leche a couple of times. One was aged about 40. The other one was slightly younger."

Araceli further disclosed: "The police have spoken to them both. They arrived on Saturday and were due to stay until Monday, but they left on Tuesday."

When probed if they were required to stay for questioning by the police, her reply was non-committal: "I don't know."

Over a span of more than 10 days, emergency services have tirelessly combed through the rugged valley from daybreak to dusk, in a dire attempt to find Jay. They have concentrated their efforts on the location where his last mobile phone signal was traced.

His father Warren Slater, 58, has voiced strong criticism towards the Spanish police, expressing dissatisfaction over the lack of transparency regarding the progress of the search.

Growing ever more frustrated due to perceived lack of communication, he shared: "Nobody's told us - the mountain police brilliant, but I don't know how the other police [force] works. They could be doing everything but if they are doing [something], they're not telling us what they're doing, if you understand what I'm saying."

Lucy, a friend, has also criticised the Spanish police force and claims that they are "not doing a good job". She is calling for the British police to step in.

However, the local authorities, Guardia Civilia, declined an offer of help from Lancashire Police.

Lucy voiced her concern: "We are having to do this all by ourselves as Spanish police are not doing a good enough job. They don't even speak English. It's been a very slow process here so we need the British police to come out and help them."

A statement from Lancashire constabulary read: "Whilst this case falls outside the jurisdiction of UK policing, we have made an offer of support to the Guardia Civil to see if they need any additional resources. They have confirmed that at this time they are satisfied that they have the resources they need, but that offer remains open and they will contact us should that position change."