Glenn Cameron worked for blue chip organisations for more than 20 years in various roles and had travelled the world, but in 2012 he ended up homeless in London.
The 46-year-old, who was born in Glasgow but brought up in Stirlingshire, had been struggling with depression for 10 years.
This led to alcohol problems and then suddenly everything came to a head.
Unable to cope, he found himself on the streets, sleeping in cinemas, Hyde Park, on benches by the Thames and even Terminal 3 at Heathrow Airport.
“Being homeless was the worst thing that ever happened to me,” he says.
“You feel as if you are completely and utterly isolated. You feel so alone. You just feel nobody cares if you live or die.
“It can happen to anybody if someone gets a rough break or the wrong things happen. I sat in Heathrow thinking ‘how did I get here?’ ‘What did I do wrong?’
“There was a total sense of isolation and embarrassment. I was embarrassed about being homeless.
“I think the country should be embarrassed. I can’t believe a country like Britain allows this to still happen.”
Mr Cameron, who hasn’t worked for eight years, found he couldn’t move up the council list as a single man, and didn’t even move up a priority category when he became homeless.
Then one day he found a Borderline leaflet in a toilet in Leicester Square.
The charity, where he now volunteers, got him into the YMCA where he stayed for nearly three years.
He then moved into a one bedroom flat in north London a year-and-a-half ago, which ScotsCare helped him furnish.
Mr Cameron is now looking for a job and is working with a careers advisor, but many of the positions he can apply for are so badly paid he would be at risk of not keeping up with rent and becoming homeless again.
Reflecting on his earlier life, he says it feels “as if it was another person”.