RISKS/BURDENS/BENEFITS The participant is subject to the risk of the procedures of gastroscopy and small bowel capsule endoscopy itself. Bleeding and perforation are the major risks of undergoing a gastroscopy and occur in 0.02% of procedures. There is also a risk of sedation related complications if the patient chooses this option. The main risk of SBCE is retention of the capsule, occurring in up to 2% of examinations. Since the participant is undergoing these procedures as part of their medical investigation these risks are discussed when the patient is offered the investigations at the time of booking, they are also formally consented by a trained individual when they attend for the procedure. Participants are not felt to be at any additional risk by undergoing magnetically steerable capsule examination of the stomach.