Tartan Angels sheds light on the work of the Scottish Ambulance Unit (SAU) and the crucial part it played in British medical and humanitarian aid to Spain. In the eighty-five years since the outbreak of the civil war an immense historiography has developed. A steady widening of focus has seen the inclusion of studies that address the intense and prolonged suffering of a civilian population affected by political repression, relentless military bombardment, deprivation, and disease. Likewise, focus has shifted to those who provided assistance to victims during and after the conflict. To date, academic emphasis has been on the left-wing politics behind such endeavours, with too little attention given to the humanitarian responses themselves. Tartan Angels embraces this argument in its focus on the Scottish Ambulance Unit, an enterprise that was arguably apolitical in nature and comprised of individuals inspired, above all, by compassionate and unselfish motives. However, the reputation of the Unit suffered irreparable damage as a result of a series of incidents and events that still remain not fully explained or understood. Furthermore, there were those who used controversy and rumour to deliberately undermine the fundraising efforts of the Units patron and supporters. There is much still to be learned about the creation and the functioning of the SAU an outstanding but largely overlooked humanitarian gesture on behalf of the people of Scotland to those suffering the effects of a brutal civil war in Spain.