Carol Vorderman MBE is one of Britain's best-loved TV presenters and is renowned for her mathematical skills. She has hosted numerous TV shows on science and technology from Tomorrow's World to How 2, and was co-host of Channel' 4's Countdown for 26 years. A Cambridge University engineering graduate, she has a passion for communication science and technology and has a keen interest in coding. Dr John Woodcock has a degree in physics from the University of Oxford and a PhD in computational astrophysics from the University of London. He started coding at the age of eight and has programmed all kinds of computers, from single-chip microcontrollers to world-class supercomputers. His many projects include giant space simulations, research in high-tech companies, and intelligent robots made from junk. Jon has a passion for science and technology education , giving talks on space and running computer programming clubs in schools. He has worked on many science and technology books. Craig Steele is a specialist in Computing Science education. He is a Project Manager for CoderDojo Scotland, which runs free coding clubs for young people. Craig has previously worked for the Raspberry Pi Foundation, Glasgow Science Centre, and the BBC micro-bit project. Craig's first computer was a ZX Spectrum.