Background: Discourse surrounding Equality, Diversity and Inclusion (EDI) has received significant attention within the UK academy and knowledge brokerage contexts, and more recently within academic-policy engagement spaces (Walker et al, 2019a; Fawcett, 2021; GOV.UK, 2021; Morris et al, 2021). Key players in this space identify the need for diversifying academic participation, as well as diversifying knowledges (GOV.UK, 2021; UK Parliament, 2018; UKRI, 2023). However, conceptual and practical insight on embedding EDI principles (and what they mean in this context) within academic-policy engagement processes is missing. Aims and objectives: Underpinned by feminist and decolonial epistemological concepts, this article addresses this gap by outlining strategies, and surfacing ways in which EDI within academic-policy engagement is experienced, conceptualised, understood and considered. Methods: Two parallel qualitative studies, with a total of 20 semi-structured narrative and realist interviews conducted with marginalised researchers (n=10, Study A) and university based knowledge brokers (n=10, Study B), and a rapid literature review. The analysis used a narrative and thematic framework. Findings and discussion: We found a want for EDI to go beyond just diversity of people and representation, towards fostering foundational principles of epistemic justice, equitable access, value-driven engagement and plurality. Academics and knowledge brokers reported both negative and positive experiences within this space that related to known EDI issues. We conclude that EDI cannot be standardised across higher education contexts, and emphasise the need for holistic, relational and plural approaches to EDI across academic--policy engagement systems through a value-led, equitable and ethical lens.