The coffee giant has already pledged to convert all its US cafes to green energy, and now it is looking to extend the strategy a year on from signing the RE100 sustainability agreement.

The expansion will see over 550 stores in the UK, France, Switzerland and the Netherlands draw their power from sources such as wind and hydropower.

Jaz Rabadia MBE, senior manager of energy & initiatives at Starbucks Europe, said, “We are focused on creating stores that are designed, constructed and operated with sustainability in mind, and we understand the importance of contributing to a low-carbon economy.

“We are committed to building on the progress already achieved and will continue working on developing long term relationships with renewable energy providers and generators.”

Starbucks works with a variety of energy suppliers across Europe and said it has identified providers which are able to offer renewable tariffs.

It is the latest hospitality chain to invest in green technology after Costa trialled the launch of a zero-energy ‘eco-pod’ store​ and Leon announced its switch to 100 per cent renewable power ​earlier this year.