The search for missing Jay Slater has entered a ninth day since he was last heard from in Tenerife.

The 19-year-old, from Oswaldtwistle in Lancashire, disappeared after attempting to return to his accommodation after the NRG festival, which took place on 16 June.

The apprentice bricklayer was staying at an apartment in the north of the Spanish island with friends he had met at the event, but after missing the bus the following morning, he called a friend to tell her he was going to make the 10-hour walk back.

Mr Slater also told her he had 1% battery on his phone, he had “no idea” where he was and needed water.

On Monday, police cars were seen parked at the entrance to a mountain track in the Rural de Teno National Park, close to the location where Mr Slater’s phone last pinged.

Specialist dog teams have also been out looking for him, with much of the search focusing on an area near a national park in north-western Tenerife.

Mr Slater’s father has been appealing for help from the local community in Santiago del Teide, where the family went after an unconfirmed report of a possible local sighting.

Warren Slater said somebody “must know something”.

“I just want him to be found. End of,” he added.

• 16 June – Mr Slater attended the NRG music festival with friends at Papagayo nightclub in the tourist resort of Playa de las Americas in the south of the island
• 17 June – Between 03:00 and 06:00 BST, he goes to stay in an apartment in the north of the island with people he had met over the course of the night
• At about 07.30 Mr Slater posts a picture on Snapchat from the doorway of the property he stayed at overnight, tagged as being in Rural de Teno park
• At 08.30, he calls his friend, Lucy Law, telling her he had attempted to walk back to his accommodation after missing his bus
• In a phone call, he said he had “cut his leg” on a cactus and had “no idea where he was”
• Ms Law said her friend told her he was “lost in the mountains, he wasn’t aware of his surroundings, he desperately needed a drink and his phone was on 1%”
• Mr Slater’s phone runs out of battery shortly after with his last known location being in Rural de Teno park and at 09:04, he is reported missing
• 18 June – After friends spend the previous day searching to no avail, local police and mountain rescue teams scour Rural de Teno park for Mr Slater. His family fly out to Tenerife to join the search
• 19 June – The search is temporarily moved to the Los Cristianos area in the south of the island due to a potential lead, but this is quickly discounted and the search returns north
• 20 June – The search returns to Rural de Teno park, around the village of Masca. Emergency workers comb bushes, overgrown terrain, hillsides and rivers but fail to find the missing teenager
• 21 June – Spanish police reject an offer of support from Lancashire Constabulary as the hunt continues
• Search and rescue personnel carefully looked through dead palm trees covering a river at the bottom of the hillside near to a rental property Mr Slater had reportedly been driven to
• The owner of the property told reporters she saw Mr Slater walk up the road past her property but did not see him again after that – describing the situation as worrying
• 22 June – Mr Slater’s mother issues a direct plea to her missing son on the sixth day of the hunt, saying: “We just need you home”
• Firefighters appeared to conduct the majority of the searches, wearing helmets to tackle dangerous hillside terrain in Tenerife
• 23 June – Search teams narrowed their efforts on small buildings close to where Mr Slater’s phone last pinged
• Officers from the Guardia Civil in the Canary Island can be seen circling two structures at the bottom of a ravine in Rural de Teno Park
• 24 June – The search for Mr Slater enters an eighth day. Police cars are seen parked at the entrance to a mountain track near where the 19-year-old’s mobile phone was last traced

Listen to the best of BBC Radio Lancashire on Sounds and follow BBC Lancashire on Facebook, X and Instagram. You can also send story ideas to northwest.newsonline@bbc.co.uk