2025 TCS London Marathon becomes first UK marathon to earn evergreen sustainability certification

The 2025 TCS London Marathon is the first major event and marathon in the UK to be awarded Evergreen certification by the world’s leading sustainability certification programme dedicated to sports events and organisations. The event achieved 61 out of a maximum potential of 66 credits, surpassing the 55 out of 61 credits the event achieved in 2023 when it was first awarded the Gold standard certification.  

The award builds on the event’s 2023 Gold certification, as well as the Evergreen certification for organisers London Marathon Events (LME) last year.   

In 2025, LME again used the ReScore app, a cloud-based application for responsible event planning developed by Tata Consultancy Services (TCS) for CRS. ReScore enabled LME to assess the environmental and social impact of the TCS London Marathon, as well as report, verify, and certify against sustainability standards set by the Council. Specifically, the app offered a tracking and monitoring system, templates, resources, and best practices for transparent, efficient, and sustainable strategies. 

The CRS event-level assessment is based on five key areas of social and environmental impact. These are: planning and communications; procurement; resource management; access and equity and community legacy. The ReScore app is used to consistently capture and assess performance across these critical areas. 

CRS highlighted the following standout achievements at the 2025 TCS London Marathon: 

• Planning and communications: LME’s sustainability strategy addresses key areas of sustainability such as energy, waste, stakeholder engagement, inclusion, accessibility, and communications. 
• Procurement: purchasing decisions are guided by LME’s principles of sustainability and social responsibility. Preference is given to suppliers that demonstrate commitments to environmental conservation, ethical practices, and community engagement.
• Resource Management: a comprehensive and well-structured Waste Management Plan to minimise the event’s environmental impact. The plan includes clear objectives and outlines the classification of waste streams, procedures for handling collected materials, plans for the installation of recycling stations, guidance for volunteers, and methods for tracking waste. 
• Access and Equity: an Inclusion Advisory Group is a standout initiative that connects directly with community organisations representing underrepresented groups in the event. Additionally, the DEI Playbook serves as a valuable tool to ensure various event teams are engaged in meeting inclusion objectives. Accessibility initiatives were also implemented to address the diverse needs of participants.
• Community Legacy: participants in the 2025 TCS London Marathon raised a world-record breaking total of £87.3 million for charitable causes, bringing the cumulative total raised since the first edition of the London Marathon in 1981 to £1.4 billion. 

Patricia Narváez, Evaluator, Council for Responsible Sport, said: “The TCS London Marathon is setting a global benchmark for sustainability in sport and athletics. Initiatives such as Tees for Trees, the use of biofuels, the introduction of water refill stations, and medals made from recycled metals demonstrate impressive innovation. The event’s community legacy is equally meaningful — through projects like the new Green assembly area, the TCS London Marathon is redefining how participants and communities engage with mass sporting events. Its strong commitment to inclusion, celebration of cultural diversity, and collaboration with running crews to enhance accessibility ensures that everyone can be part of this remarkable event.”  

Hugh Brasher, CEO of London Marathon Events, said: “We’re incredibly proud that our work has once again been recognised by the Council for Responsible Sport with Evergreen status for the record-breaking 2025 TCS London Marathon. Meaningful change can only happen when we work together, and we remain committed to collaborating with our participants, partners, and stakeholders to drive progress. Our hope is that this achievement inspires others to join us in creating a more equitable, environmentally conscious, and active society.” 

Vinay Singhvi, Head of UK & Ireland, TCS, said: "We congratulate London Marathon Events on achieving Evergreen certification from the Council of Responsible Sport for the 2025 TCS London Marathon. We are proud to have partnered with the team on this journey, providing technology and expertise such as our ReScore app to measure, manage, and minimise the event’s overall environmental impact. At TCS, we see sport as a powerful platform to advance sustainability, and this pioneering achievement highlights how emerging technologies are already reshaping marathons into safer, smarter, and more sustainable events. For us, this isn’t just a finish line. It's a powerful signal that we’re entering a new era of sustainable, tech-smart sport and the TCS London Marathon is paving the way for the global running community.” 

The full list of events around the globe certified by the CRS can be viewed here. It includes world-leading basketball, track and field, golf, ironman and mass participation running events.