Dr Macnair graduated from Newcastle University in 2009 with merit. Following University, he trained down in London completing his MRCP in 2012 prior to starting his specialist training. His specialist clinical oncology training was based in South London at the Royal Marsden, Sussex Cancer Centre and also Imperial College London. He passed his FRCR in 2017. He has completed an MD with UCL in clinical trial methodology while he worked as a clinical research fellow at the MRC clinical trials unit. He also took a year out of training to do a year with the Faculty of Medical Leadership and Management. During this year he worked jointly at Macmillan Cancer Support and the Royal College of Radiologists. He completed his final year of training in the Edinburgh Cancer Centre before starting as a consultant.