FULL TITLE PAGE: Title: Patients' experience of colonoscopy in the English Bowel Cancer Screening Programme Manuscript type: Original Article Authors: Alex Ghanouni 1 Andrew Plumb 2 Paul Hewitson 3 Claire Nickerson 4 Colin J Rees 5 Christian von Wagner 1 Affiliations: 1 Department of Epidemiology and Public Health, University College London, London 2 Centre for Medical Imaging, University College London, London 3 Nuffield Department of Population Health, University of Oxford, Oxford 4 NHS Cancer Screening Programmes, Sheffield