 Faecal microbial transplantation FMT has proven to a safe, inexpensive and effective treatment for recurrent Clostridium difficile infection achieving up to 90 cure rates in some studies with a very good side effect and adverse event profile van. Nood et al.. In this study the investigators wish to investigate whether restoring healthy gut microbiota profiles, using stool from healthy donors, will lead to improved clinical outcomes for patients with IBS. 