The UK's decision to leave the European Union represents the most substantial change in the governance of UK agricultural land use since the UK's incorporation into the EU's Common Agricultural Policy(CAP) in 1973. This could affect approximately 218 000 agricultural holdings and involve a potentially radical change in the management and governance of 72% of the UK's land. To achieve the UK government's vision of a 'Green Brexit' (Defra, 2018), a new Environmental Land Management (ELM) scheme is in the process of being devised. This will mean that the c.£2.3bn of annual payments to UK farmers will be based upon the principle of 'public money for public goods' (e.g. enhanced biodiversity and improved soil, water and air quality), replacing the current EU CAP system that allocates payments based upon the amount of land owned by the claimant. The Department for Environment Food and Rural Affairs (Defra) - which is the government department responsible for devising and delivering the post-Brexit ELM - has stated that this new policy will be developed in collaboration with stakeholders. In order to contribute to the development of this scheme, this project will work with Defra and multiple stakeholders to develop and test a model for 'co-producing' the post-Brexit ELM scheme. This will improve our understanding of the ways by which the principles and practices of co-production can be applied to help create more effective government policy and identify ways to collaboratively involve the people and organisations most affected by the policy changes at all stages of the process. To help design, deliver and evaluate the post-Brexit ELM policy development process, this project will: 1. Bring together international case studies and academic, policy and stakeholder expertise to understand and develop more effective ways to co-produce the post-Brexit Environmental Land Management policy; 2. Work with active ELM trial projects (through participatory research) to understand 'what works' in terms of governance, participation and how this new approach functions in practice; 3. Involve stakeholders from individual farm level through to Non-Governmental Organisations, industry and policy (including the Devolved Administrations) via workshops and policy labs to help critique and refine the ELM policy; 4. Reflect on how useful this model of co-production is in creating new government policies and in producing impactful academic research The findings of this research will be relevant to the UK Government, agricultural and environmental organisations and to the individuals - primarily farmers and land managers - as they adjust to the reformed relationships that will result from the UK's exit from the EU.