The experience of anti-corruption interventions the world over is that an incorrect diagnosis leads to an inadequate response. Prisons, in the UK and elsewhere, are ideal environments for corruption to thrive. Yet there is little available research or literature on the nature, extent and prevalence of corruption in prisons. Where there have been studies, references to corruption have usually been a minor part of works whose primary focus is elsewhere. On the specific subject of corruption, the focus has generally not been on corrupt staff, although a classic corruption analysis would show them as high risk. Other corruption risks also exist in the prisons environment, such as within procurement, and it is possible that these risks have been compounded by performance management KPIs and aspects of privatisation