Kirsty Young's castaway this week is Lemn Sissay.

As a poet, writer and playwright, much of his work tells the story of his search for his birth parents. Born to a young Ethiopian woman who wanted him temporarily fostered while she completed her studies, he was with a family until he was 12. He would spend the next five years in a number of children's homes where he began to write. On leaving care at 17, he self-published his first book of poetry while on the dole.

Several poetry collections, plays and programmes for radio and TV followed and his work has taken him around the world. He was the first poet to be commissioned to write for the 2012 London Olympics and his success has also brought him two doctorates and an MBE for services to literature. He is about to be installed as Chancellor of the University of Manchester, an elected post he will hold for the next seven years. He takes writers' workshops for care-leavers and set up Culture World, the first black writers' workshop.

Producer: Cathy Drysdale.

Kirsty Young's castaway this week is the musician, Alison Balsom.

Widely considered the finest classical trumpet player of her generation, she's performed in all the great concert halls of the world, winning a huge amount of fans and a string of awards for her ability to exquisitely convey the many voices of her chosen instrument.

As a child she had dreams of being a part-time trumpet player, astronaut and jockey - she's only 36 so there's time yet for the other two; but whilst she is solely devoting her energies to her instrument her belief in the power of music seems endless. In between gigs, rehearsals, recordings and motherhood, she's found time to travel to Uganda and Liberia as patron of Brass for Africa, with the heartfelt conviction that she can transform the lives of street children by teaching them to play.

Producer: Sarah Taylor.

Kirsty Young's castaways this week are the comedy writers Laurence Marks and Maurice Gran.

Grammar school boys from North London they first met as ten year olds at a youth club, growing up to have 'real jobs' in the civil service and journalism, before finally embarking on the precarious business of making a living from putting words into other people' mouths.

Producer: Sarah Taylor.

Kirsty Young's castaway this week is Dame Judi Dench.

Born into a family with dramatic leanings, she followed one of her older brothers, Jeffery, to drama school. Having abandoned ideas of becoming a set designer, she made her professional debut as Ophelia at the Old Vic in 1957. An illustrious stage career followed in Franco Zeffirelli's Romeo and Juliet in 1960, in Cabaret in 1968 and as Lady Macbeth for Trevor Nunn in 1976. On TV she found huge success in sitcoms - appearing with her husband, the late Michael Williams, in A Fine Romance and with Geoffrey Palmer in As Time Goes By.

She received an Oscar nomination for her first big-screen part as Queen Victoria in Mrs Brown; Shakespeare in Love won her an Academy Award for Best Supporting Actress; Mrs Henderson Presents, Notes on a Scandal, Iris, and Philomena followed. She played the part of 'M' in the James Bond films seven times and is about to appear as Paulina in Sir Kenneth Branagh's production of Shakespeare's The Winter's Tale.

Married to Michael Williams for 30 years, their daughter, Finty, is also an actress.

Producer: Cathy Drysdale.

Kirsty Young's castaway this week is Dr Bill Frankland.

Frequently referred to as the "grandfather of allergy", his achievements include the introduction of the pollen count to the British public and the prediction of increased levels of allergy to penicillin.

Born in Cumbria in 1912, Dr Frankland turned 103 in March. He studied medicine at Oxford and worked at St Mary's hospital in Paddington, London, before war intervened. He signed up to the Royal Army Medical Corps (RAMC), but spent over three of the six years he spent in the army as a prisoner of war in Singapore.

After the war, he began work in the dermatology department at St Mary's, but quickly switched to allergy which became his passion. During the fifties he served as a registrar to Alexander Fleming who had discovered penicillin back in 1928. In 1954 he published a seminal research paper about a double-blind randomised trial proving that pre-season pollen injections greatly reduced the symptoms of hay fever sufferers.

He has treated high profile patients including Saddam Hussein and given evidence in court - possibly the oldest expert witness to do so. He continues to work in a private practice and has remarked, "I really don't know what people do when they retire at 65.".

Kirsty Young's castaway is the chef and restaurateur, Ruth Rogers.

Born in America, she has become one of the UK's most celebrated cooks. Despite not being a trained chef, she set up The River Café with her business partner, the late Rose Gray, in 1987. The focus was on high quality, seasonal produce cooked the Italian way. Many of today's top chefs including Jamie Oliver, Hugh Fearnley-Whittingstall, Theo Randall, Sam Clark and Allegra McEvedy began their careers in their kitchen. The café was awarded a Michelin star in 1997.

The youngest of three children, Ruth Rogers' parents were both immigrants and very political. In the late sixties, she left America and moved to London where she joined other Americans protesting against the Vietnam War. In 1969 she met the architect, Richard, now Lord, Rogers and they married in 1973. The couple moved to Paris when Richard Rogers and his partners won the contract to design the Pompidou Centre. There she learned the importance of seasonality: subsequent visits to Italy shifted her passion to Italian cooking.

Producer: Cathy Drysdale.

Kirsty Young's castaway is Monica Grady, Professor of Planetary and Space Sciences at the Open University.

Well-known in scientific circles, at NASA and the European Space Agency, she came to the attention of the general public with her enthusiastic celebration when, as part of the Rosetta project, the probe Philae became the first-ever spacecraft to land on a comet - 67P - in November 2014. The spacecraft had taken ten years to journey through space and a decade was spent on the preparations.

She was born in 1958 in Leeds as the eldest of eight children. She studied chemistry and geology at Durham University and did her PhD on carbon in meteorites at Cambridge, where she worked closely with Professor Colin Pillinger on the Beagle 2 project to Mars. She first worked at the OU in 1983 before joining the Department of Mineralogy of the Natural History Museum, becoming Head of the Meteorites and Cosmic Mineralogy Division. She is married to Professor Ian Wright who is one of the lead scientists on the Rosetta cometary mission and they have one son. She was awarded a CBE in 2012 for services to space sciences and asteroid (4731) was named "Monicagrady" in her honour.

Producer: Cathy Drysdale.

Kirsty Young's castaway this week is the musician, Noel Gallagher.

He was the principal songwriter of the band Oasis - his younger brother, Liam was the lead singer. Born to Irish parents, as a child he spent his summers visiting his mother's family in rural County Mayo, in sharp contrast to the Manchester council estate where they lived. He taught himself to play the guitar and loved music: he was road manager for the Inspiral Carpets before joining Liam in Oasis.

Their debut album in 1994 marked the beginning of the band's rise to fame as part of the Britpop movement. In 1996 they played in front of 250,000 fans over two consecutive nights at Knebworth and following the Labour landslide in 1997, Noel attended what became known as the Cool Britannia party held in Downing Street by Tony Blair. Oasis won six BRIT Awards and two Ivor Novello Awards before disbanding in August 2009.

He's since formed his own band - Noel Gallagher's High Flying Birds.

Producer: Cathy Drysdale.

Kirsty Young's castaway this week is the poet and artist, Imtiaz Dharker.

Winner of the Queen's Gold Medal for her work, her life seems a perfect reflection of the inter-relatedness of The Commonwealth. Born in Pakistan she was no more than a few months old when the family packed up their belongings and flew four thousand miles to start a new life - exchanging the blistering, dusty lanes of Lahore for the blustery, rain-slicked roads of Glasgow.

Her father worked hard and, from scratch, built a big, successful business and a comfortable life for his children. But the immigrant fairytale came undone when his restless, well-educated, westernised daughter married in secret, running away to Bombay. Her parents disowned her and she would never see her mother again.

Her work centres on themes of freedom, cultural intolerance, everyday life and gender politics.

Kirsty's castaway this week is the former England cricketer Andrew 'Freddie' Flintoff.

One of the best players of his generation, he was part of the England team that won the Ashes in 2005, a year that marked his sporting coming of age. On the strength of that historic victory he was awarded an MBE for services to the game, and the public voted him BBC Sports Personality of the Year.

Barely out of his pram when he picked up a cricket ball he turned out to bat for an under-14 match when he was just six years old. His debut was not in crisp cricket whites, but in a second hand Manchester United tracksuit, setting the tone for someone who's made a habit of doing things his way. Not least at a 10 Downing Street reception when, somewhat the worse for wear, he weaved into the cabinet room, plonked himself down in the PM's chair and knocked back yet another bottle of beer.

Since retiring from the game he's had a go at heavyweight boxing and won the bout. One area where he hasn't come out on top: his sons never listen to his cricket coaching tips.

Producer: Sarah Taylor.