The father of a British man who was killed on board Germanwings Flight 4U9525 has said the co-pilot's motive for crashing the plane is "not relevant" and has implored airlines to better look after their pilots.
Paul Bramley, 28, was one of three Britons who lost their lives in the Airbus A320 Alps crash.
Phillip Bramley, his father, has said the emphasis should be placed on ensuring that this never happens again.
Germanwings co-pilot, 27-year-old Andreas Lubitz is thought to have intentionally brought down the plane and further investigation has revealed that he had hidden a sick note which declared him to be unfit for work on the day of the disaster.
A former girlfriend of Lubitz told German newspaper Bild that the co-pilot had previously vowed to do something "that would change the system" and be remembered. She also described him as "tormented".
Mr Bramley said: "What happened on the morning of 24 March was the act of a person who at the very least was ill.
"If there was a motive or reason we don't want to hear it. It's not relevant.
"What is relevant is this should never happen again. My son and everyone on that plane should not be forgotten ever."
Paul Bramley was described by his father as a "lovely lad" and was studying hospitality and hotel management in Switzerland. He was flying back to the UK via Germany after holidaying with friends.
He also thanked the UK authorities for their support.
"We would like to thank the Foreign Office and David Cameron for all the work they've done, they've been very good," he said.
"[We would also like to thank] the French authorities, it must be a terrible job."
Paul's mother, Carol also paid tribute to her son and said he was "kind, caring and loving" and that he was her world.
Other victims identified in the crash include 50-year-old Martyn Matthews from Wolverhampton, seven-month-old Julian Pracz-Bandres and his mother Marina Bandres Lopez-Belio, from Manchester. The mother and child were returning from Spain after a family funeral.