This is a qualitative interview study to understand patients' priorities for different aspects of tests when considering a colonic investigation. Patients currently waiting for colon capsule endoscopy (CCE), and colonoscopy will be invited to take part. Semi-structured interviews will be carried out over the telephone following an interview guide. Recorded interviews will be transcribed and undergo thematic analysis. We will seek to publish the results of this study to inform future research and developments for colonic investigations.

Inclusion Criteria:

• Patients over 18 who are on the waiting list for a colonoscopy or CCE. Only patients who can provide valid consent will be included.
• English language speaking (translation services are not available for this study).

Exclusion Criteria:

• Patients undergoing colonoscopy due to positive bowel screening test or due to surveillance of known colonic pathology.

This study will involve recruiting patients on the waiting list for colonoscopy or colon capsule endoscopy from one NHS Scotland Health Board.

This is a qualitative interview study so individual data will not be available to share