Independent sustainability certification validates all the progress we make, and helps us find ways to go even further.

We engage with multiple independent bodies to be assessed, benchmark our progress against our peers, and identify areas where we can improve our policies and performance.

Disclosure Insight Action (CDP)

Over 4,000 organisations in some 60 countries around the world disclose their GHG emissions and climate change strategies through CDP.

We have reported our climate change performance to CDP since 2013, and water management performance since 2015. In 2021, we retained our B- score in both categories (A is the maximum rating).


EcoVadis is the only universal sustainability ratings provider, and helps monitor the performance of companies’ upstream value chains.

The EcoVadis platform and its assessment helps us to identify ways to improve. In 2022, we kept our score of 63 and retained our silver status. We also use the platform to understand the sustainability rating of current and potential suppliers.


The FTSE4Good Index Series is designed to measure the performance of companies demonstrating strong environmental, social and governance (ESG) practices.

We’ve been a member of FTSE4Good since 2004. Our overall score is 3.2 (5 is the maximum rating), and we’re committed to improving this rating as we grow.

London Stock Exchange Green Economy Mark

This mark is awarded to companies who earn more than 50% of their revenue from environmental solutions. It recognises green technology companies and businesses from any industry who are making a significant contribution to the transition to a more sustainable, low-carbon economy. We were awarded this mark in 2021 and 2022.

Annual Report 2021


ESG Datapack


2021 Scope 1 and 2 Verification Statement


Scope 3 Emissions Report