Kirsty Young's guest this week is the garden designer, Dan Pearson.

His style is governed by a desire to create a sense of place and he is drawn to wild plants and gardens. Aged just five he discovered this passion, while building roof gardens for his collection of trolls and spent the summer watching the plant and animal life in a pond created by his father.

He gave up A' levels in favour of apprenticeships at RHS Wisley and the Royal Botanic Gardens at Kew and then spent several years working abroad, studying plants in their natural environment. His first large-scale project was creating a garden for Frances Mossman, a colleague of his mother's, who asked him to design the garden at her Northamptonshire plot. He won more clients through word of mouth and set up his own garden design company in the late 1980s. His work has since taken him all over the world and he has designed five award-winning gardens for the Chelsea Flower Show. Amongst his current projects he is creating a design for London's proposed Garden Bridge.

Producer: Cathy Drysdale.

Kirsty Young's castaway is Angie Hobbs, Professor of the Public Understanding of Philosophy at the University of Sheffield - a role which has brought her to the attention of a large audience.

Brought up in Surrey, she was the youngest of three children. Her older sister died when Angie was just 11 years old. To begin with, she did not flourish at school, but went on to earn a place at Cambridge where she gained a first class degree in Classics and subsequently a doctorate. A career in academia has followed - after many years at the University of Warwick, she moved, in 2012, to the University of Sheffield.

Producer: Isabel Sargent.

Kirsty Young's castaway is the Director of London School of Hygiene and Tropical Medicine, Professor Peter Piot.

As a microbiologist he is known for his research into viruses and into the public health aspects of sexually transmitted diseases, and, more recently, on the politics of AIDS and global health. Born in Leuven in Belgium, he studied medicine and in 1976, as a young researcher at the Institute of Tropical Medicine in Antwerp, he was sent a blood sample of a Belgian nun living in what was then Zaire who had fallen ill with a mysterious disease. On investigation, Piot and his colleagues realised it was a virus they'd not seen before which they went on to identify as Ebola. He then travelled to Zaire to help quell the outbreak.

Later, back in Antwerp, he developed an interest in sexually transmitted diseases and joined the World Health Organisation's Global Programme on HIV/AIDS in 1992. Appointed as Executive Director of the newly created Joint United Nations Programme on HIV/AIDS in late 1994 his major successes were putting AIDS on the political agenda and achieving a reduction in the price of antiretroviral drugs.

Producer: Cathy Drysdale.

Kirsty Young's castaway this week is the campaigner, Dame Julia Cleverdon.

As head of the charity, Business in the Community, she fine-tuned to perfection the art of persuasion. A phone call from her and many of the big beasts of the business world - the "pinstripes" she calls them - stride from their boardrooms intent on giving something back to society. Her energies and endeavours have powered countless corporate social responsibility programmes.

In a life dedicated to public service, she has charmed not only chief executives but apparently royalty too - HRH the Prince of Wales is a long time supporter and collaborator.

She seems keenly aware that not everyone has her good fortune of a first class education and top drawer connections - when she's not harrying the blue chip brigade, she's inspiring young people from all sorts of backgrounds to follow her example and get involved in social action.

She says, "one of the most important leadership roles is to grow people. It is very much like gardening. You tend them and apply fertiliser. But sometimes you have to prune them to make them grow stronger."

Producer: Paula McGinley.

Kirsty Young's castaway this week is the business woman, Jo Malone.

If her name automatically conjures the citrusy scents of lime, basil and mandarin or spicy notes of amber and lavender then you're doubtless one of the customers who flock into the eponymous stores to buy the products that have made her a household name.

Aged nine, she would grind sandlewood and strain juniper at the kitchen table. 17 years later fashionable London flocked to her little salon in Chelsea to be massaged with oils and unguents. In the 1990s the brand went international and the fragrance made her fortune when she sold the business.

If this all sounds like a fragrant little fairy tale, crisply wrapped in a signature black grosgrain bow, it isn't. Severely dyslexic she left school at 14. Her dad was a talented painter but a chronic gambler too, and home life was sometimes hand-to-mouth. Later, and at a time in her life when she should have been enjoying her success and her toddler son, she was diagnosed with an aggressive form of breast cancer. Finally fully recovered she decided to start again from scratch.

She says, 'I love sharing my story, and I'm not frightened of people seeing the cracks as well as the strengths. I think the things that are sad and difficult are just as important.'

Producer: Cathy Drysdale.

Kirsty Young's castaway this week is the scientist, Professor Dame Nancy Rothwell, who is best known for her work in the field of neuroscience and stroke research. She is now President and Vice-Chancellor of Manchester University.

Could it be that her interest in how we keep the human body alive and functioning began when, aged eight, she contracted primary tuberculosis and was so ill she spent 18 months at home?

She says, "Like most academics my fate was sealed during my PhD, I fell in love with research and vowed I would do it until retirement. I was also sure that I would do my utmost to avoid any of those nasty administrative jobs."

Producer: Christine Pawlowsky.

Kirsty Young's castaway this week is the actor Ray Winstone.

Nil By Mouth, Sexy Beast, Vincent, The Sweeney - he's probably best known for totally authentic tough-guy, geezer-parts. But his work has more range and nuance, encompassing roles as varied as Henry VIII, Magwich in Great Expectations and the lead in Beowulf.

Beyond the screen the man himself almost seems to come from a bygone era, when a fellow worth his salt always wore a dapper three piece suit and was handy with his fists. In his youth as a boxer he won 80 of his 88 fights and it seemed for a while that a whiff of menace had followed him out of the ring and onto the streets.

However he says, "I'm not like the geezers I play: loads of things scare me in everyday life but you have to hide a bit and put on a front. I cry at movies, I cry at scripts, I cried when West Ham got back into the Premiership - I'm even frightened of spiders."

Producer: Cathy Drysdale.

Kirsty Young's castaway for Christmas week is The Archbishop of Canterbury, the Most Reverend Justin Welby.

Ordained as a priest in 1993, 19 years later he was appointed to lead the Anglican communion of over 77 million people spread across 167 countries. Hardly a front runner when the job vacancy came up he said that it would be "a joke" and "perfectly absurd" if he were appointed.

His faith has brought him high office but when he 'found God' at university, it gave him something a good deal more significant: a sense of much needed comfort after an often turbulent and uncertain childhood. Although his mother's side of the family provided stability, his father was an alcoholic and his childhood was punctuated by his parents' early divorce and significant money worries - one particular Christmas was spent hungrily staring out of the window as his father lay in bed all day.

He says, "When the church is working it is the most mind-bogglingly, amazingly, extraordinarily beautiful community on earth. It heals, it transforms, it loves, and it changes society."

Producer: Cathy Drysdale.

Kirsty Young's castaway this week is the Chief Executive of the Guide Association, Julie Bentley - or, more accurately, Girlguiding.

The name change is surely a clue to the evolving nature of an organisation determined to be relevant and useful to girls in the 21st century. Indeed being relevant and useful is how Julie Bentley has spent her entire working life. From her early efforts at an HIV charity to running the Family Planning Association she says her passion lies with helping young people develop confidence and direction.

Never a Brownie or Girl Guide herself, she was brought up in what she describes as "a happy working class family in Essex" and it took her a little while to find her own self assurance and sense of purpose. A painfully shy child, who was bullied at primary school, she later went on to become Head Girl, but left school with very few qualifications. In her 30s she used a bequest from her mother to fund her Master's degree.

She says of the Girl Guides, "It is not about itchy brown uniforms and sewing and baking. It is a modern, contemporary, vibrant organisation."

Producer: Christine Pawlowsky.