Outcome Research in Bowel Irrigation Techniques for the Treatment of Chronic Constipation and/or Faecal Incontinence

Inclusion Criteria: * Faecal incontinence (FI), chronic constipation (CC) or co-existing FI/CC, all of heterogenous origin * Positive Rome IV criteria for functional constipation and/or positive Rome IV criteria for faecal incontinence * 18 years or older * Ability to understand written and spoken English (due to questionnaire validity) * Ability to understand and provide written, informed consent prior to any investigation-specific procedures Exclusion Criteria: * Prior use of transanal irrigation * Neurogenic bowel dysfunction * Low anterior resection syndrome (this group will be excluded due to the possibility of being randomised to a balloon catheter). * Previous rectal and/or anal surgery (except minor rectal or anal surgery such as haemorrhoid procedures, anal fissure surgery, drainage of a perianal/rectal abscess, or other rectal or anal surgeries deemed minor by the investigator) * Physical disability that affects the ability to independently use the irrigation device * Intermittent use of opioids inducing chronic constipation * Patulous anus * Participation in research conflicting with the current investigation * Physical or mental conditions affecting the ability to comply with the clinical investigation plan * Pregnancy or plans to become pregnant during the investigation period