Dr Bonar whistleblower says doping is 'endemic' in cycling

Blood samples in doping control

Blood samples in doping control

Dan Stevens, the whistleblower at the centre of the Sunday Times' investigation into the practices of Dr Mark Bonar, has warned that doping is an "endemic" problem in cycling, that other doctors like Bonar are operating, and that doping may have become far more sophisticated in the upper echelons of the sport.

Patrick Fletcher

Patrick is a freelance sports writer and editor. He’s an NCTJ-accredited journalist with a bachelor’s degree in modern languages (French and Spanish). Patrick worked full-time at Cyclingnews for eight years between 2015 and 2023, latterly as Deputy Editor.