Jay Slater search volunteer condemns online trolling

Ms Duncan said: “Additionally, since our stay in Tenerife needs to be extended, we will also use the funds to cover accommodation and food expenses.

“I’m surrounded by wonderful people who are by my side, but far from their loved ones, so we’ll also be using part of these funds to fly them to Tenerife so we can support each other during these dark times.”

Mr Slater, an apprentice bricklayer, had travelled to Tenerife to attend the NRG music festival with two friends.

He was last heard from shortly before 9:00 BST on June 17 when he called a friend to say he was lost, thirsty and had 1% battery on his phone.

Mountain rescue teams, the Guardia Civil police, drones, specialist search dogs and helicopter crews have been involved in the search without success so far.

Lancashire Police said they have offered assistance to their Spanish counterparts, who declined saying they “have the resources they need”.