The brother of a man who is missing in Switzerland has issued a fresh plea to find him following weeks of searches.
The engineer, from Middlesbrough, had travelled abroad for a two-week solo holiday.
However, on 22 June, all contact was lost with him. He was last seen on the Eiger mountain trail, in the Grindelwald area.
His brother Connor Roche, 32, has said that despite the use of a search helicopter and distribution of missing posters, he has still not been located.
A fundraiser was also launched by his "extremely worried" family and friends - and has so far raised £25,710.
Swiss authorities launched a police and mountain rescue search to find the former St Joseph's and Newlands FCJ School pupil, however, after weeks of searching, this was put on pause.
The GoFundMe was launched with hopes to help generate new leads for the local Swiss authorities.
Mr Roche, who grew up in Longlands but now lives in Wynyard, said: "We have been back over there, me and some other family members, but nothing has been found from our searches and nothing has been found from any further police searches.
"We just need some more information. We've had nothing coming in from any of the missing posters.
"We've also now been given the bill for the search helicopter, which came to £7k."
The fundraiser had a target of £30,000 and has almost reached it, with many donators leaving comments wishing his family and friends the best with their efforts.
Connor continued: "It is one of his friends that has organised it - it has done so much better than we could've thought."
Aidan, an offshore chemical engineer, was previously living in Leeds but was planning to move back to live in Middlesbrough after he had been on his two-week solo travel trip. He is described as 6ft 2in tall and weighing 13stone.
"It's hard to describe him really," Connor said. "He's a character and this solo travel thing is exactly the type of thing he loves. He just can talk to absolutely everyone and he can just make friends with anyone."
Mr Roche had a phone and GPS watch on him when we went missing, and his brother said his family is now trying to find out where he could have been heading.
He explained: "There is nowhere else we think he could've been that we haven't already looked. We were just looking at any way we can find what direction he was going in."
A friend previously described how it was "unlike" Aidan to stop contact with people, with Connor adding: "Even on the day he went missing, he was messaging and sending pictures and videos.
"It's one of the things that is frustrating, that sudden lack of communication."
What is left of the money raised will be donated to mountain rescue teams.
Thanking everyone who donated, Mr Roche added: "We didn't realise we would have something like this - and even if people can't donate, even if they are just able to share, it is a massive help."
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