Lidl, who will be the UK’s first supermarket retailers to launch the trial, will apply the Eco-Score labelling to over 50 of its own-label products including teas and coffees, as well as supporting this with wider communication in its stores.

Eco-Score will use open-source data to independently grade products on their sustainability credentials and will assign a colour code ranging from green 'A' (low impact) all the way to red 'E' (high impact).

In order to grade a product, Eco-Score must independently assesses various factors including production methods, impact on biodiversity, packaging and carbon footprint and products can receive better scores if they are certified to third party schemes such as Fairtrade and Rainforest Alliance.