1. National Radiotherapy Trials Quality Assurance Group (RTTQA), Mount Vernon Hospital, Northwood, UK
2. Radiotherapy Special Interest Group, Institute of Physics and Engineering in Medicine (IPEM), York, UK
3. Northern Centre for Cancer Care, Freeman Hospital, Newcastle, UK
4. Leeds Cancer Centre, St James’s University Hospital, Leeds, UK
5. Department of Medical Physics and Clinical Engineering, Addenbrooke’s Hospital, Cambridge, UK