Stoma formation using the sutured trephine annular reinforcement technique

INTERVENTION: Stoma formation via standard trephine formation Stoma formation via sutured trephine annular reinforment technique CONDITION: Parastomal hernias/stoma formation/colorectal surgery ; Surgery ; Colorectal surgery PRIMARY OUTCOME: Parastomal hernia rates at 30 months, or at time of stoma reversal SECONDARY OUTCOME: 1. Stoma related complications requiring hospital admission; 2. Changes in quality of life assessments over a 30 month period INCLUSION CRITERIA: Participants must: 1. Require an elective stoma due to bowel disease 2. Have given written informed consent 3. Be aged 18 or over 4. Agree to the randomised procedure 5. If of childbearing potential, must have given a negative pregnancy test