Costa, Starbucks, Marks & Spencer and financial firms across City of London collaborate in bid to collect five million used coffee cups by end of 2017
Cardiff University research details how a range of simple measures could cut coffee cup waste by up to 300 million cups a year
Coffee chain claims BREEAM 'outstanding' accredited building is largest and most sustainable coffee roastery in Europe
Partnership is transforming coffee giant's waste coffee grounds into renewable fuel