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A mathematician and cyber defence expert, Poppy Gustafsson has been handed an integral role within government, as the prime minister attempts to grow the economy and attract international investment.She was born in 1982, to parents John and Gilly. Her father ran an agricultural sales business, while her mother was a journalist.In her early career, Poppy Gustafsson worked for a venture capital firm before co-founding Darktrace, a cybersecurity company, in 2013. She would go on to take the role of co-CEO in 2016 and became the sole CEO in 2020.Darktrace was among the first companies in its field to use artificial intelligence (AI) or machine learning to improve cyber-security.So, as ministers attend the World Economic Forum in Davos, what tricks does this one time CEO of the Year have in store? Mark Coles has been taking a closer look.Production Team Presenter: Mark Coles Producers: Sally Abrahams and Bethan Ashmead Latham Editor: Ben Mundy Sound: James Beard Production Co-ordinators: Maria Ogundele and Jack Young

She is the renowned scientist who studied environmental engineering, and went on to hold the role of mayor of Mexico City during the Coronavirus pandemic.Late last year, Claudia Sheinbaum made further history. "For the first time in the 200 years of the [Mexican] Republic, I will become the first woman president of Mexico," she said before taking office.Born in 1962, Claudia Sheinbaum’s father was a chemical engineer and her mother, a biology professor. Both parents descended from Jewish immigrants from Europe who settled in North America.She’s enjoyed remarkably high poll ratings since taking office, but critics suggest she will live under her mentor’s shadow, and her biggest test is yet to come. As Donald Trump gets ready to enter the White House for a second time, Claudia Sheinbaum has already had to respond to his suggestion to rename the Gulf of Mexico to Gulf of America.So what lies ahead? Stephen Smith has been talking to her friends, colleagues and peers to find out more about Mexico’s history-maker.Production Team Presenter: Stephen Smith Producers: Sally Abrahams and Bethan Ashmead Latham Editor: Ben Mundy Sound: Neil Churchill Production Co-ordinator: Maria Ogundele and Jack Young Credits Emilia Perez, Trailer Director, Jacques Audiard; Production companies: Why Not Productions, Page 114, Pathe, France 2 Cinema, Saint Laurent Productions"Claudia: El Documental", Director: Rodrigo Imaz; @ClaudiaSheinbaumP https://youtu.be/NDuUL-RQvMUThe Nobel Peace Prize, 2007, Nobelprize.org

He's been described as the best connected man in the business world. Allan Leighton’s the arch-moderniser who's led some of the UK's most well-known companies. His career started at Mars Confectionery in the mid-70s, working his way up through the business over nearly two decades. But, it was in the 90s that Allan Leighton really made his name.He moved to Asda in 1992, becoming Chief Executive four years later. There he was credited with a successful turnaround of the supermarket and oversaw its acquisition by Wal-Mart in 1999.By the 2000s, Allan Leighton had left Asda to 'go plural', as he put it, and went on to take prominent positions in companies including Royal Mail, Co-Op, Dyson and lastminute.com. But late last year, the supermarket chain came calling again.Mark Coles has been talking to his friends and peers to understand where Allan Leighton came from and what’s in store for him at Asda.Production Team Presenter: Mark Coles Producers: Nathan Gower and Sally Abrahams Editor: Ben Mundy Sound: James Beard Production Co-ordinators: Maria Ogundele and Jack YoungCredits: Marketing Academy: Rene Carayol interviews Allan Leighton Mars Maltesters, TV advert 1970s Walmart Rollback TV advert 1998 Asda Rollback TV advert