John Mildinhall is Head of Data Science for Retail at Marks and Spencer. He is building the next generation of AI systems to deliver efficiency worthy of 2023 to over a thousand stores in the UK. His team provides a quarter of a million forecasts to the business each week, and tens of millions of pounds worth of value to M&S each year. He has a Ph.D in Neuropsychology and wrote the Open Data strategy for both the Department for Transport and the Ministry of Justice.