In sustainability transitions research, the deliberate destabilisation of socio-technical regimes is increasingly recognised as a central intervention point. Absent, however, are granular approaches for assessing whether regime destabilisation actually occurs in processes of systemic change. We propose to assess regime destabilisation through shifts in the institutionalisation of field logics. Methodologically, we employ Socio-Technical Configuration Analysis to map changes over time in the composition and alignment of institutional and technological concepts embedded in sectoral policy.

Empirically, we assess the extent to which post-Brexit agricultural policy reform in the United Kingdom marks the destabilisation of an unsustainable regime. Assessing legislative debate transcripts, we find that the previously dominant regime is only partly destabilised, as pre-existing development trajectories along established configurations of field logics, policy goals and instruments remain. These findings support the validity of our conceptual approach. Moreover, they nuance expectations about large-scale policy change as windows of opportunity for regime shifts.

在可持续发展转型研究中，社会技术制度的故意破坏越来越被认为是一个中心干预点。然而，缺乏评估政权不稳定是否确实发生在系统性变革过程中的细粒度方法。我们建议通过领域逻辑制度化的转变来评估政权的不稳定。在方法论上，我们采用社会技术配置分析来绘制部门政策中嵌入的制度和技术概念的构成和调整随时间的变化。

根据经验，我们评估了英国脱欧后农业政策改革在多大程度上标志着不可持续政权的不稳定。评估立法辩论记录，我们发现以前的主导政权只是部分不稳定，因为沿着既定领域逻辑、政策目标和工具的配置的先前存在的发展轨迹仍然存在。这些发现支持了我们概念方法的有效性。此外，他们将大规模政策变化的预期视为政权更迭的机会之窗。