Mark Hayward used to work for the Ritz, but a few months before Christmas he was living on a rooftop in Crystal Palace, south London. Desperate to get back on his feet, the former Royal Marine stood outside the premises of a nearby homelessness charity and dialled the number on the door. Nobody answered, even though he could see someone inside.
For the 46-year-old, who was once proud to wear the famous green beret, it was the latest slight in a downward spiral which began when he left the Royal Marines 11 years earlier. Homelessness, he says, became "an ironic cycle" which seemd impossible to break.
"To get out of this situation – to be clean, clothed and present myself to people – you need to be able to have a shower and wash your clothes. I was disgusting and filthy, and I felt distanced from the old me, like it was a different world," he recalls.
Born in Shropshire, Hayward grew up in the countryside and spent his childhood on farms. He loved the outdoors and was an enthusiastic member of the Cubs, Scouts and Cadets, before leaving school at 16 to work as a trainee gamekeeper.
In 1989, aged 20, he joined the Royal Marines and completed 32 weeks of gruelling training. "It's about strength of character more than anything else, and single-mindedness," he says. "They quite literally try to get rid of you – and if they can't, despite their best efforts, then you've proven that you've got what it takes. I welcomed it, and put myself in their hands."
Over a career spanning 14 years, Hayward worked in heavy weapons, learning how to destroy tanks, and trained as a helicopter door-gunner. He served in Bosnia and Northern Ireland, where he was a "bullet-catcher", or personal bodyguard for bomb-disposal officers. Later he worked in intelligence, planning secret operations.
Hayward was single-minded and driven, but he was also prone to bouts of depression. He says he knew "very early on" in his life that something was not quite right, but it is only in the past few months that he has been diagnosed with Asperger syndrome, the autism-spectrum disorder.
When he tried to seek help within the Marines, he says he was scoffed at by medical officers, repeatedly diagnosed with different ailments and ultimately forced to "get by and cope" as best he could. To his dismay, he was medically discharged in 2003 – losing the prized green beret and badge he had fought so hard to win.
In pictures: Homeless Veterans appeal
In pictures: Homeless Veterans appeal
1/20 Glynn Barrell
Glyn Barrell is among the veterans hoping to benefit from the self-build scheme in Plymouth
2/20 Rachel Holliday
Rachel Holliday is converting a police station into a hostel
3/20 Androcles Scicluna
Veteran Androcles Scicluna says performing boosted his confidence
4/20 Christopher Cole
Christopher Cole, 51, from London, spent three years in the Army but left in 1982
5/20 Maurillia Simpson
Former servicewoman Maurillia Simpson with the medals she won at last year’s Invictus Games
Jeremy Selwyn/Evening Standard
6/20 Martin Rutledge
Head of The Soldiers’ Charity, Martin Rutledge, says charities sometimes allow emotion to dictate their choices
7/20 Ben Griffin
Ben Griffin wants to open people’s eyes to the cycle of political violence
8/20 Robin Horsfall
Robin Horsfall, who fought in the Falklands and helped end the Iranian embassy siege
9/20 Mark Hayward
A bed for the night and food helped Mark Hayward out of misfortune
10/20 Ashley Rosser
Ashley Rosser, who served in the RAF, at the Veterans Aid hostel in east London
11/20 Dave Henson
Britain's Invictus Games captain Dave Henson says veterans’ charities helped rebuild his life
Chris Jackson/Getty Images
12/20 Hugh Milroy
Hugh Milroy dispels myths about war-zone veterans through his work as the CEO of Veterans Aid
13/20 Andy MacFarlane and Julie Taylor
Former soldiers Andy MacFarlane and Julie Taylor work at the Jaguar Land Rover plant in Solihull under a covenant connecting veterans with employers
14/20 Mark McKillion
Mark McKillion's experience of living on the street eventually left him feeling as though the only way to escape was to end his life. He survived his desperate jump from Westminster Bridge, and VA's help has restored his "faith in humanity"
Nigel, a navy veteran, remembers living on the beach in the run-up to Christmas, when it rained every day for a week. He slept on a bench for seven years whilst suffering from Parkinson's disease.
16/20 Keith Cooper
Before Keith Cooper had his place confirmed at Avondale House in Newcastle, he was working out whether he could afford to buy a tent to live in
17/20 Simon Weston
Simon Weston, a Falklands War veteran, said even something as simple as a cup of tea can be an important step in getting the life of a homeless veteran back on track.
18/20 Ian Palmer, professor of military psychiatry
Ian Palmer, the first professor of military psychiatry to the British Armed Forces, says that the depiction of all ex-service personnel having post-traumatic stress disorder may stop people who really need help from getting it
19/20 Douglas Cameron
Evgeny Lebedev with Douglas Cameron, who had a hernia operation while serving in Burma
Johnnie Shand Kidd
20/20 Veterans Aid
General Sir Mike Jackson, President of ABF The Soldiers' Charity, called for donations to the Homeless Veterans appeal
"When I lost that badge, I lost the pride that I had also," he says. "When you're outside in civvy street walking around, no one knows who you are. No one knows anything about you. I was so afraid that I'd lost this identity that I'd gained, and I became quite insecure. My whole life had been about joining the Marines."
He floated from job to job, first working as a barman in Portsmouth then as a bouncer in Barcelona, where he lived for several years. He returned to the UK and moved to London, working in security for the Ritz Hotel and the Graff diamond company, living in a smart Docklands flat overlooking the Thames.
Outwardly his life seemed to be going well, but he often had disagreements with his employers, forcing him to change jobs – a cycle he now puts down to Asperger's. He lost his security licence after getting into a fight and being cautioned by the police. With no steady income, he was forced to move out of his flat.
"It got to the point where I couldn't stay with a friend, I couldn't sofa-surf any more," he says, recalling how he finally decided to sleep rough. As he was still being paid his military pension, his plan was to save enough to pay for a deposit on a new flat.
"I thought I could use my military training and basically camp out, take myself out of the system for a while until I could build up enough money," he says. "But the practicalities of being homeless are something that you don't really think about.
"The first night I sat on a bench, but you can't sleep or do anything because you're so vulnerable. I found a flat roof with trees growing over it, hidden from view. I was really afraid that somebody would see me – I couldn't handle the fact that me, of all people, was in this position. So I had to be invisible until I could come back into the system again and keep it all quiet."
After trying several charities and failing to get help, he reluctantly phoned Veterans Aid. "I associated the word 'veteran' with Chelsea Pensioners and people who've been through world wars, and I thought it wasn't going to be what I'm looking for," he recalls. "But something about the way they spoke to me was different – it wasn't condescending, or pitiful. They just said: 'How long will it take you to get to Victoria?'"
An hour later, Hayward was sitting in the charity's drop-in centre in central London. That night, he was given a handful of meal vouchers and a room in a hotel. "I was sitting in my room watching TV and thinking: 'When are they going to realise they've made a mistake?' It wasn't just a room to me, it was the beginning of the future, because I wasn't homeless any more," he says.
He is now living in New Belvedere House, the charity's hostel in Stepney, east London. "In a way I'm glad I had to fall completely," he says. "When you've fallen that far, but ultimately make it to where you want to be, people say 'Hats off to you'. That's the new badge on my arm."