I am very happy to provide a reference for Dr Peter Walton and his team in Dendrite Clinical Systems Ltd for their superb support for the United Kingdom National Bariatric Surgery Registry. Since the idea of an NBSR was born in 2007 Peter has been unfailingly helpful in the initial establishment of the registry, design, algorithms and dataset, and the production of our first national report of patient outcomes in 8,000 patients with one and two year follow ups in 2011.