“…The ongoing feeling of uncertainty generated by these specific penal features is often compounded by the 'total arbitrariness' and opacity that many indeterminate sentenced prisoners feel governs their existence (Crewe, 2011: 513). Yet while these feelings of ambivalence pervade the entirety of an indeterminate sentence, the magnitude and nature of this challenge appears to vary over time (see, for example, Crewe et al, 2020Crewe et al, , 2017Hulley et al, 2016;Leigey and Ryder, 2015;Liem, 2016;O'Donnell, 2014;Wright et al, 2017Wright et al, , 2021. According to O'Donnell (2014), for example, prisoners approaching the tariff endpoint of an indeterminate sentence-the earliest possible release date for this group-experience this not with hope but considerable stress and 'trepidation'.…”