Lorde, Little Simz, and Wet Leg are set to perform this weekend at Forwards Festival on Clifton Down in Bristol, which is being billed as the world's first major music festival run almost entirely on clean power. The event's two stages will be driven by a combination of hydrogen fuel cells — supplied by clean energy firm GeoPura, whose only byproduct is pure water — and mobile battery units charged from renewable sources. The project, backed by regional public funding and modelled on a landmark low-carbon concert by Bristol trip-hop collective Massive Attack (Massive Attack), is being touted as a global template for decarbonising live events, television production, and other large-scale gatherings, with organisers already in talks to expand the scheme to other cities across England.