Six-time Olympic champion Sir Chris Hoy has announced he has been diagnosed with cancer.The 47-year-old former track star said he is currently undergoing treatment, including chemotherapy, saying it is "going really well" and that he currently feels "fine".

Six-time Olympic champion Sir Chris Hoy has announced he has been diagnosed with cancer.The 47-year-old former track star said he is currently undergoing treatment, including chemotherapy, saying it is "going really well" and that he currently feels "fine".