Who is included in the study?

We invited people to participate in this study through the NHS Bowel Cancer Screening Programme. People were eligible to be invited if they were between 60 and 71 years of age, had taken part in the NHS Bowel Cancer Screening Programme, and tested positive for blood in their stool, and subsequently had a colonoscopy at which one large polyp or multiple small polyps were found (and so were considered at intermediate risk).