In his pin-stripe suit with no tie, Duncan Bannatyne OBE looks every inch the modern day entrepreneur. When we meet in the luxurious surroundings of London's Charlotte Street Hotel, nothing's too flash or rushed - his next appointment is to meet his agent for lunch some four hours away - but Bannatyne exudes an air of supreme confidence that presumably comes from knowing that you're set up for life.

In fact, Bannatyne is so at ease in his entrepreneurial typecast that it makes you wonder why it's only recently that the man on the street might know who he is, and even that's more down to his blossoming television career than anything he has achieved in his business life.

Which is a shame, because this story is perhaps the dream rags-to-riches tale that should be inspiring a whole generation of entrepreneurs. "Entrepreneurship in other countries is very different to how it is here," he says, in a thick Glaswegian accent. "There are a lot more self-employed business people in France, for example. Wherever you go, there's a shop and the owner's in there. Britain has to become more of an entrepreneurial country to keep up with the economy."

Although he's probably best known for his role in BBC's Dragons' Den and Mind Your Own Business, Bannatyne has a string of vastly successful business ventures to his name. After initially setting up an ice cream business, Bannatyne owes the majority of his success to his chain of nursing homes, Quality Care Homes.

When he sold that in 1996, he turned his attention to children's day nurseries and Bannatyne Fitness, a health club chain with 37 outlets that now turns over £30 million a year. That's as well as Hotel Bannatyne - a 60-bedroom hotel in the north-east of England that turns over £1.5 million a year - Bar Bannatyne and Bannatyne Casino, both in Newcastle-upon-Tyne, and public speaking slots that start from £10,000 a time, making Bannatyne worth somewhere in the region of £130 million these days.

Paper money
But it wasn't always like that. Bannatyne grew up on a Clydebank housing estate "the wrong end of Glasgow". Yet even then there were glimpses of what was to come. His first entrepreneurial experience came at the age of 11 when he went knocking on people's doors until he had enough names of people who wanted newspapers delivered to convince the local newsagent to give him a paper round.

But two weeks after his 16th birthday Bannatyne joined the Royal Navy, where he spent the next four years, before having "an altercation" with his commanding officer, which involved throwing him over the side of an aircraft carrier for a £10 bet.

Bannatyne was sentenced to nine months' detention in Colchester army barracks to consider his ill-discipline, spending his 20th birthday behind bars. After seven months he was released, and headed back up to Clydebank to sign on the dole. He qualified as a welder and spent four years working in the area. "But I was 25 and I got really fed up of it," he says. "My overalls were dirty and my fingernails were filthy." He'd heard that Jersey was meant to be a great place for young people, so off he went.

"I ended up living in as a barman and I was in Jersey for the next five years having a great time: playing pool and nightclubbing every night," he remembers. "Then I was on the beach one day and I said to my girlfriend ‘you know, I was the oldest swinger in town last night. Let's go back and start a business'. And she said ‘OK'."

After a week of knocking on doors of local businesses, they both got jobs in a bakery in Stockton-on-Tees. They bought a £12,000 house, with a £10,000 mortgage, before Bannatyne stumbled across the ice cream van at an auction, at the age of 31. "It cost £450, which was about all the money I had in the world back then. I got the Yellow Pages out and phoned ice cream suppliers, filled the van up and started selling ice cream," he says. He quit the bakery job and Duncan's Super Ices was born.

He got his big break when a concession came up for the sole right to sell ice cream in a local park. "A lot of people ask me what makes entrepreneurs different," he says. "Well, there were about 50 to 100 people who were selling ice cream in the Middlesbrough area and this concession came along and you had to enter the highest bid to rent it for a year from the council. So I bid £2,000 for it and I won and made £18,000 profit that summer. But why didn't the other ice cream men who were also
supposed to be entrepreneurs bid for that?"

Within three years, he was running six ice cream vans and two café outlets and turning over £250,000 a year. "It was a great life but I was getting a bit fat because I couldn't stop eating ice cream, so I thought I would try and do something different," he says. "And I couldn't expand any further because I was too vulnerable to the opposition. I had my patch and that was it."

Something different turned out to be Quality Care Homes, a chain of nursing homes that Bannatyne started from scratch in 1986. It is this venture that set him up for life. With the fees offered by the government, he realised that it was possible to make a tidy profit while offering residents their own bedrooms with private bathrooms.

But it was a constant battle to pay the bills for the building work. "At the end of the first month I managed to scrape together enough money from the ice cream business and put the next two on two credit cards, so I had £10,000 on each," he says. "At the end of the fourth month I sold the house. The wife wasn't too happy but eventually we got this nursing home finished."

With money coming in, he was able to persuade the bank to lend him £250,000 to finance another nursing home. The business was growing, but so were the debts. Five years later, with 12 homes on the go and debts of £6 million - "we had a bit of a problem," he says - someone suggested floating on the stock market. He phoned up brokers one by one until one agreed to meet him. The company floated in 1992 for £26 million, which he still regards as his finest achievement other than teaching his children how to swim, and when he was made an offer he couldn't refuse four years later, he sold the firm for £46 million to Principle Healthcare, taking £26 million for himself.

Bannatyne owes much of his success to his ability to spot a gap in the market. Just Learning was started in 1996 when he struggled to find a nursery for his own children, Hotel Bannatyne developed when he drove past a derelict building every day which he "thought was a shame to be lying empty", while the inspiration for Bannatyne Fitness was a skiing accident which left him with a badly injured leg.

"I was sitting in the gym trying to build my leg muscles up again," he says. "I knew how much it was to join because I was paying the fees, I knew how many people were members because I asked and I knew how big it was because I counted the tiles along the wall and I thought ‘this is good, I'll have one of these', so I opened my own gym.

"A lot of people just don't try and do other things in their life," he adds. "Almost anybody who goes into entrepreneurship will succeed. You have to find a product and just go for it."

Into the Dragons' lair
These days, however, you're more likely to find Bannatyne on the small screen than in the boardroom. "When you've got enough money, making money's boring," he admits. In the highly successful first series of Dragons' Den, Bannatyne and four other entrepreneurs - the founder and ex-chief executive of Red Letter Days Rachel Elnaugh, Simon Woodroffe from Yo! Sushi, technology businessman Doug Richards and Peter Jones from Phones International - assessed potential entrepreneurs looking for funding. His most notable contribution was to invest with Elnaugh in Elizabeth Galton's jewellery, a subject he admits he knows little about.

"I mostly invested in that because of Elizabeth," he says. "We kept asking her questions and she just kept coming back with this big smile and an answer and I thought that if anybody could do it, it would be her. It's a bit of a crazy investment and it's a real risk, but it's only £55,000. And if it becomes a big name and I'm part of it, then that would be fantastic."
A lot of people ask me what makes entrepreneurs different. Well, there were about 100 people selling ice cream in the Middlesbrough area and this concession came up. I bid £2,000 and I won and made £18,000 that summer. But why didn't the others bid?

There was an "incident" with Elnaugh, he admits, which meant she didn't invest in the end but the money was eventually put up by a combination of Bannatyne and an investment banker. Bannatyne has recently finished filming for a second series of Dragons' Den, scheduled to be shown this autumn, which will have the same format, with Theo Paphitis, majority shareholder in the Ryman stationery chain and La Senza lingerie and former owner of Millwall Football Club, replacing Woodroffe.

But Bannatyne's life isn't just about work and TV appearances. When he's not at his six-bedroom mansion in the north-east or his Cannes villa, he goes to Romania two or three times a year to see how Casa Bannatyne is getting on. This is an orphanage for children with HIV who have been abandoned, while a similar project in Columbia opened in February for street children. It is his charity work and his other projects with UNICEF and Scottish International Relief that landed Bannatyne an OBE in 2004.

Bannatyne is rightly proud of his achievements but he still has unfinished work. "I was part of a revolution that stopped old ladies living six in a bedroom and was part of a revolution in children's day nurseries because every class I built had doors going out into the garden," he says. "Now I want to be part of the revolution that says anybody can be an entrepreneur and I think that message is being spread with programmes like Dragons' Den, The Apprentice and Mind Your Own Business."

As you might imagine, Bannatyne is pretty happy with the way things have worked out. He'd still be interested in expanding the health clubs or opening another casino but doesn't rule out selling up either (£120 million would be tempting for the health clubs, he says). He admits that being single is the price he pays for being so busy but has six children aged between three and 21, four with his ex-wife and two more recent additions with his ex-fiance, none of whom show any signs of following in his footsteps. "Life is terrific at the moment with my business, my television and children so if nothing else happens I'll keep going as I am," he says.

But old habits die hard and those old entrepreneurial skills that got him that paper round all those years ago are still around. "I never got that £10 for chucking the commanding officer off the ship," he says. "If you're out there, I still want it. I haven't seen you since."

From ice cream to TV screen
1949: Born in Clydebank, Scotland

1965: Joins the Royal Navy

1969: Sentenced to nine months' detention in Colchester army barracks after throwing his commanding officer off an aircraft carrier. "I learned that I wasn't very good at discipline, and that was a bit of a weakness in the Navy," he says

1970: Heads back to Clydebank and trains as a welder

1974: Went to Jersey and worked in casual jobs

1980: Moved to Stockton-on-Tees and got a job in a bakery. Bought an ice cream van at a car auction and set up a business selling ice cream

1982: Won a concession to sell ice cream in a local park. Within three years the
business was turning over £250,000 a year

1986: Built his first nursing home in the north-east based on the revolutionary concept of giving every resident their own bedroom with private bathroom

1992: Quality Care Homes is floated on the stock exchange for £26 million

1996: Sold Quality Care Homes for £46 million, earning £26 million for himself.
Started Just Learning with £2 million of his own money after failing to find a nursery for his children. This eventually grew to 22 nursery homes nationwide.
Started Bannatyne Fitness (December) after spotting the potential while
recovering from a serious knee injury. The company now has 37 health clubs and turns over £30 million a year

1997: First Bannatyne Fitness health club opens in Stockton-on-Tees (October). Bought the derelict Grange Hotel in Darlington and opened a luxury hotel, now known as Hotel Bannatyne. This now consists of 60 bedrooms and also offers luxury cuisine at Maxine's Bar & Restaurant

2002: Sold Just Learning for £25 million to investment house Alchemy

2003: Was the subject of a BBC2 television documentary, Mind of a Millionaire.
Awarded North Region Master Entrepreneur of the Year in the Ernst & Young LLP awards

Casa Bannatyne opened in Romania (May)

2004: Awarded an OBE for his services to charity

2005: Member of the panel on hit television business show Dragons' Den, during which he invests £55,000 in Elizabeth Galton's jewellery range, and Mind Your Own Business, during which Bannatyne attempts to turn around the fortunes of ailing small companies

Columbian version of Casa Bannatyne opened (February)