1 UK SABR Consortium Committee, UK; Department of Clinical Oncology, Oxford University Hospitals NHS Foundation Trust, Oxford, UK; Clinical Oncology Quality Improvement and Audit Committee, Royal College of Radiologists, London, UK. Electronic address: rebeccamuirhead@oncology.ox.ac.uk.
2 UK SABR Consortium Committee, UK; Radiotherapy Physics, Barts Health NHS Trust, London, UK.
3 UK SABR Consortium Committee, UK; National Radiotherapy Quality Assurance Group, Mount Vernon Cancer Centre, Northwood, UK.
4 Clinical Oncology Quality Improvement and Audit Committee, Royal College of Radiologists, London, UK; Department of Clinical Oncology, Imperial College Healthcare NHS Trust, London, UK.
5 Lung Unit, Royal Marsden NHS Foundation Trust, London, UK; UK SABR Consortium Committee, UK.