Desert Island Discs

Fellow of both the Royal Academy of Engineering and the Royal Society, Dame Wendy fought long and hard to prove that her type of web science was highly significant and here to stay. If algebraic topology and open hypermedia systems really aren't your thing, Dame Wendy is also in demand as a brilliant communicator on, what can seem to outsiders to be, impenetrable topics.Her parents were from humble beginnings and it was clear from the get-go that their first born had a budding flair for numbers: aged six she was charged with teaching a group of schoolmates maths. The first in her family to go to University she rejected Cambridge, judging it "too stuffy".She says, "I get too excited about stuff. I love my life and am passionate about web science, women in science and shopping".Producer: Cathy Drysdale.

Doug Allan is Kirsty's castaway this week. He's spent thirty-five years capturing unique footage of animals in some of the most remote and least hospitable places on earth. If you've watched fuzzy little polar bear cubs frolic in the frozen wilderness or slick killer whales eerily circling their prey, the spellbinding footage is his. David Attenborough, a long- time collaborator describes his work, simply, as "extraordinary".A trained biologist he first made a living diving into the icy rivers of Scotland searching among the mussel-beds for pearls; a useful early lesson in patience and coping with the cold. His subsequent dedication to a working life in the wilderness has bagged him a slew of Baftas and Emmys but there's also been an emotional toll - he's coped with periods of depression and is twice divorced.He says, "Big animals are my passion. I particularly love working with large mammals because they're intelligent and you can develop a relationship with them"And he's at his happiest at -18 degrees centigrade!

Actress Anne Reid is interviewed by Kirsty Young for Desert Island Discs.For a long time the bedrock of Anne Reid's successful career seemed to be her perfectly nuanced portrayal of a variety of northern mums - what she calls "skirt and jumper roles". Her first major role was playing Valerie Tatlock in Coronation Street - her character's funeral was watched by millions.In 2003 the skirt and the jumper came off when she and Daniel Craig starred in the highly acclaimed movie The Mother, about a frumpy looking woman in her late 60s who passionately seduces her daughter's boyfriend.Anne Reid has appeared in Victoria Wood's comedy series Dinnerladies and is currently playing Celia in BBC drama Last Tango in Halifax about two widowed septuagenarians finding love again.She says, "...inner talent gives you that ease. It's not a remarkable thing - just a knack that gives you a very nice life."Producer: Paula McGinley.

Professor Sir Michael Marmot is interviewed by Kirsty Young for Desert Island Discs. He's an epidemiologist who has spent his career studying what the key factors are in leading a long and healthy life and how your income and post code can affect your longevity.Professor of Epidemiology and Public Health and Director of the Institute of Health Equity at University College London, Sir Michael specialises in what are known as the social determinants of health: how where we are in the wealth and status pecking order directly influences our chances of illness, disease and lifespan. Why is it, for example, that in 2014 in the same British city the average life expectancy for a man in one post code will be 82 but just a few miles away it's 54? His work has influenced politicians around the globe.His pioneering research is often at odds with wider societal concerns over what are known these days as lifestyle choices - like smoking, not taking any exercise or eating junk ... he says simply "what I contribute to the policy debate is that I bring evidence - I don't do the skulduggery of politics.".

Kirsty Young's castaway this week is the singer and songwriter Lily Allen. Less than a decade ago she dipped her toe in musical waters by releasing her demos on social media, this summer she's one of the headline acts at Glastonbury. It's 29 years since she first appeared at the festival; back then she was a new-born being carried through the crowd in swaddling. Indeed, she was as good as baptised at the font of celebrity culture - her dad, Keith, is an actor and writer, her mum, Alison, is an award-winning film producer - for a time her step-dad was Harry Enfield. So, it seems almost inevitable that she's ended up at the centre of a media-saturated life.Except that in all likelihood she would have been propelled there entirely by her own endeavours: her lyrics are witty and wise-ass and capture concisely what it is to be a savvy, young woman today. She says, "the only thing I can do really is write lyrics and the only way I know how to do that is by being honest and doing it with integrity because otherwise there's no point".Producer: Cathy Drysdale.

Kirsty Young's castaway this week is Judy Murray.A tennis coach since she was 17, she's the current British captain of the Fed Cup, the premier team competition in women's tennis, and was herself at one time ranked 8th in Britain - achievements worth celebrating.But what she's best known for is being the ultimate tennis mum. Both her sons have reached the top flight of the game - one as Wimbledon mixed doubles champion, the other becoming the first Brit to win the men's singles in 77 years. In the moments after Andy Murray's heroic win on Centre Court last year it was to her he turned pumping his fists and roaring - as if to say 'we have done it'.Judy's many followers on social media know how she spends her time - countless hours travelling up and down the country coaching and working to inspire children to take up the game.She says, 'I've always been competitive. I'm like Andy, or maybe he's like me - I wear my heart on my sleeve. And when something is great, then yep, I am right into it'.Producer: Cathy Drysdale.

Kirsty Young's castaway this week is the Palestinian author and human rights activist, Raja Shehadeh.Born in Ramallah in the West Bank, his life and writing has been dominated by displacement, struggle and a search for justice. His father was murdered in 1985 and aside from chronicling the unhappy history of his family and his homeland, he's also co-founded the Palestinian human rights organisation Al-Haq - which monitors and documents violations by all sides in the Middle East conflict, publishing reports and detailed legal analysis on its findings.Amid the heavy weight of his work he somehow finds time to nurture a glorious garden growing grapevines and pomegranates.He says of his work, "When you write your thoughts and feelings and emotions ... then you can move on to new ones. Otherwise, they will keep rotating in your mind and you will go in circles".

Kirsty Young's castaway this week is the ballerina Tamara Rojo.On stage she is a principal dancer for the English National Ballet and when the curtain comes down she performs the role of the company's artistic director. World-renowned as a stunning, emotional and dramatic performer, it must surely be a very different set of characteristics she employs off stage, marshalling her company of dancers and propelling the organisation's creative journey.She was just five years old when, sheltering from the rain she found herself in the school gym, instantly beguiled by the peace and order of a dance class. Despite her father's attempts to widen her horizons with music, sport and art lessons - her path in life was set.She says, "Life on stage is like nothing else. I've never done heroin but I'm sure that's what it's like. Every feeling and sense exploding. Every nerve in your body complete awake".Producer: Cathy Drysdale.

Kirsty Young's castaway this week is the TV producer and former Blue Peter editor Biddy Baxter. In charge of Blue Peter for 23 highly successful years, she was responsible for the coveted Blue Peter badges, the multi-million pound charity fundraising appeals and a nationwide lust for something called sticky-backed plastic. Her masterstroke was getting the young audience involved; although the programme's weekly postbag of around seven thousand letters must have given her a few headaches.In spite of some early careers advice that, "no one from Durham has ever got into the BBC", her determination to make a career in broadcasting won out and across the decades her steely reputation kept the show at the top of the ratings and steered it through quite a few mishaps and the odd spot of 'scandal'.She says simply, "It was an exercise in trying to make children feel as if they belonged.".

Rene Redzepi, Danish chef, is interviewed by Kirsty Young for Desert Island Discs.His restaurant, Noma, in Copenhagen has been named 'best in the world' for a fourth time, and holds two Michelin stars. His cooking captures not just the essence of his homeland - using ingredients like reindeer tongue, sea buckthorn or fish scales - but also a strong flavour of 'now'. He believes traditional notions of luxury are outdated. A sense of 'time and place' are his kitchen's guiding principles.His childhood was split between Denmark and Macedonia, where he spent his summers foraging in the woods. He as good as stumbled into catering, because he couldn't think of anything better to do, but pretty quickly realised that cooking allowed him to dream.He says, "The day when there is no more to do is the day when you're burned out. There are endless possibilities - it's just whether you can see them or not ... and right now I see plenty.".