Home > Mitigation Monitoring Framework (MMF) of the Climate Change Committee (CCC)
Objective
Assessing the UK's progress in reducing emissions and adapting to climate change
Description
The Mitigation Monitoring Framework (MMF) is the Climate Change Committee's (CCC) internal analytical approach to assessing whether the UK is making sufficient progress towards its emissions reduction targets. It is part of the governance architecture established by the Climate Change Act 2008, which created the CCC as an independent body, set legally binding five-year carbon budgets, and mandated annual reporting to Parliament. First introduced in the CCC's 2009 progress report, the framework was subsequently adapted to the UK's net-zero target adopted in 2019 and then substantially revised in 2022 and 2025.
Covering the entire economy, the MMF provides a common methodology for the various teams within the Climate Change Committee (CCC) to measure progress across different sectors. It combines emissions data, sectoral progress indicators, government policies, and previous CCC recommendations to identify implementation gaps and assess the credibility and sufficiency of government action. While not an implementation mechanism in itself, it increases pressure on the government to implement climate policies by making progress, delays, and policy shortcomings visible through annual reports and parliamentary scrutiny.
The MMF links short-term accountability with long-term climate planning, making it a particularly relevant case study for the APIICC to examine how procedural instruments of climate governance support policy implementation over time. It translates five-year carbon budgets and pathways to carbon neutrality into indicators that can be monitored annually, while the data collected through progress reports informs subsequent revisions of the pathways and recommendations for future carbon budgets. This creates an iterative relationship between annual monitoring and the shaping of long-term pathways. Its ongoing review and integration into the CCC's working practices also make it a valuable example of adaptive institutional innovation, enabling the progressive strengthening of climate policy implementation.
Country
United Kingdom
Ladder
National
Nature
Non-financial
In which law/program is this instrument included?
Climate Change Act
Chronology of the instrument
2008
November: adoption of the Climate Change Act 2008.
Creation of the institutional architecture of British governance in climate change mitigation: legally binding carbon budgets, independent Climate Change Committee and annual reports to Parliament.
The Climate Change Committee (CCC) is established as an independent advisory body composed of experts. It is tasked with advising the government on carbon budgets, monitoring emissions reductions and progress in the implementation of climate policies, and reporting on this progress to Parliament.
2009
May: the first three carbon budgets are established for the periods 2008-2012, 2013-2017 and 2018-2022.
The CCC begins its annual progress monitoring function. At this stage, monitoring is primarily organized around sector-by-sector assessments.
October: The CCC publishes its first annual progress report for Parliament.
Creation of the first legally binding emissions reduction trajectory, which is monitored by the CCC.
2011 – 2016
The fourth and fifth carbon budgets are established, covering the periods 2023-2027 and 2028-2032 respectively.
Extending the UK's legally binding emissions reduction trajectory into the 2020s and early 2030s reinforces the importance of long-term monitoring of progress and implementation before adopting the carbon neutrality target.
2019
The United Kingdom adopts a legally binding target of carbon neutrality by 2050 (2050 Target Amendment).
Major change in the level of ambition. Monitoring can no longer be limited to determining whether emissions are decreasing; the evaluation must also examine whether the implementation of policies is sufficiently rapid, credible and aligned with the objective of carbon neutrality.
2021
The government publishes the Net Zero Strategy: Build Back Greener.
This is the main economy-wide strategy from which the CCC can assess whether the government's plans are sufficient to meet carbon budgets and achieve carbon neutrality.
2022
June: The CCC publishes the Mitigation Monitoring Framework 2022-2024, alongside the 2022 progress report.
This represents a major methodological shift. Prior to 2022, the CCC already assessed emissions, indicators, and policy credibility, but in a less formalized manner and primarily within sectoral chapters. The 2022 Mitigation Monitoring Framework is the first explicit, systematic, and economy-wide framework for assessing progress in implementation across different sectors.
July: The High Court rules the 2021 Net Zero Strategy illegal.
Strengthening the role of independent monitoring and oversight in UK climate governance. Drawing in part on the CCC's assessment of the Net Zero Strategy, this decision reinforces the need for the government to demonstrate more clearly how its policies will achieve carbon budgets.
2023
The British Conservative government, led by Rishi Sunak, publishes the Carbon Budget Delivery Plan.
This is a revised government plan for implementing the fourth, fifth, and sixth carbon budgets, developed following the 2022 High Court ruling. More than a new climate strategy, this plan translates the 2021 Net Zero Strategy into a more detailed implementation framework with increased legal accountability. It becomes one of the main subjects of CCC oversight in the next monitoring cycle.
2024
May: The High Court rules the 2023 Carbon Budget Delivery Plan illegal.
This decision further strengthens the pressure for credible, transparent and risk-aware implementation planning.
July: The CCC publishes its progress report for 2024 to Parliament.
This is the first progress report in which the 2022 Mitigation Monitoring Framework structure is fully integrated. The evolution of the instrument is therefore taking time to translate into changes in the CCC's main annual report. The report moves further away from a structure based solely on sector-by-sector analysis and organizes the assessment more directly around emissions trends, implementation indicators, and policy credibility.
2025
June: The CCC publishes an updated version of the Mitigation Monitoring Framework.
This is not a new methodological shift. The 2022 framework remains the general reference approach. The 2025 update is shorter and more operational: it updates the indicators, takes into account the availability of new data, and aligns with the evolution of government plans, without completely rewriting the 2022 document each year.
October: the government publishes the Carbon Budget and Growth Delivery Plan.
This plan replaces the 2023 Carbon Budget Delivery Plan following the 2024 High Court ruling. The change is more politically visible than in 2023: the plan maintains the regulatory focus on the fourth, fifth, and sixth carbon budgets, but reframes implementation around clean energy, economic growth, jobs, and lower energy bills. It serves as a central benchmark for the CCC's annual progress assessment in 2026.
2026
The seventh carbon budget is established for the period 2038-2042, and the CCC publishes Progress in reducing emissions: 2026 Report to Parliament.
