The father of a British man killed in the Alps air crash has urged airlines to look after their pilots "properly".
Philip Bramley - whose son Paul, 28, was among 150 people killed in the Germanwings Airbus A320 crash - said the victims should "not be forgotten".
If there was a "motive or reason" for the crash, "we do not want to hear it", Mr Bramley also said.
The flight's co-pilot, Andreas Lubitz, is thought to have deliberately crashed in the French Alps on Tuesday.
A former girlfriend of Lubitz has told Germany's Bild newspaper that he had vowed to "do something" history would remember him by.
He had hidden a sick note declaring him unfit to work on the day of the disaster, before boarding the Dusseldorf-bound Airbus A320 and piloting it into a mountain in the southern French Alps.
The [Only registered and activated users can see links. ], citing officials, also reported that Lubitz had sought treatment for eye problems.
Mr Bramley - whose son was originally from Hull and was studying hotel management in Lucerne, Switzerland - called for airlines to be more transparent, saying pilots should be "looked after properly".
"We put our lives and our children's lives in their hands", he said.
Reading an emotional statement from the French town of Seynes-les-Alpes, close to the crash site, he said what had happened on the day of the tragedy was the act of a "person who at the very least was ill".
But he said the motive or reason for the crash "was not relevant".
"What is relevant, is that it should never happen again; my son and everyone on that plane should not be forgotten, ever," he added.
"I don't want it to be forgotten, ever."
Speaking of his son, Mr Bramley said: "I will not get him back or be able to take him home because of the nature of the impact."
"Me and my family will visit here forever," he added.
He said the French people and an "army of wonderful volunteers" had helped his family in "every aspect".
The Foreign Office has said at least three Britons are known to have died in the crash.
Martyn Matthews, 50, from Wolverhampton, was among the victims, as was seven-month-old Julian Pracz-Bandres and his Spanish-born mother Marina Bandres Lopez-Belio, from Manchester.
A special Mass has been held in the French town of Dignes, close to where the flight came down, to honour the victims and support their families.
Andreas Lubitz running a half-marathon in Frankfurt in March 2010 Lubitz's health timeline
- 2009: Breaks off pilot training while still in his early twenties after suffering "depressions and anxiety attacks", the German tabloid Bild reports, quoting Lufthansa medical files. Resumes training after 18 months of treatment, according to Bild
- 2013: Qualifies "with flying colours" as pilot, according to Lufthansa
- 2013-2015: Medical file quoted by Bild marks him as requiring "specific regular medical examination" but no details are given
- February 2015: Undergoes diagnosis at Duesseldorf University Clinic for an unspecified illness; clinic has clarified the illness was not depression
- 10 March 2015: Again attends Duesseldorf University Clinic
- 24 March 2015:Is believed to have deliberately crashed airliner, killing himself and 149 others
- 26 March 2015: Prosecutors announce that two sick notes have been found torn up at his addresses in Germany