The middle-distance runner and qualified vet says she would readily be drug-tested every day and believes she can win at the Tokyo Olympics in 2020 It is a long way from Tooting to Tokyo but, on an autumnal morning in south-west London, Laura Muir can see the path stretching out before her. After her best year as a 1500m runner the road to winning a medal at the Olympic Games seems much clearer to the Scottish veterinarian.