There are several published trials of different colon cleansing agents for colonoscopy (which is the investigation of choice for visualisation of the colonic mucosa) which compare different regimens. However, a recent published meta-analysis has shown that most audits and studies were underpowered with poor study design and so no consensus on the most effective preparation exists1. 10-20% of failed colonoscopy is attributable to inadequate bowel cleansing which has a negative impact on the detection of potential malignant lesions in the colon3 as well as requiring the patient to attend again for further colonoscopy after repeated colon cleansing which also impacts on waiting lists and healthcare costs.