https://www.carbontrust.com/en-af/what-we-do/assurance-and-labelling/the-carbon-trust-certified-organisations
The Carbon Trust certified organisations | The Carbon Trust
The following organisations have successfully certified the carbon footprint of their product, model or renewable electricity with the Carbon Trust....
carbon trustcertified organisations
https://bildact.org.uk/certified-organisations/
Certified Training Organisations
certified trainingorganisations