All the food will be vegan. All the loos will be compostable. If they're really observant, people might spot (electric) vans containing large batteries occasionally recharging other large batteries around the site, instead of having diesel generators to power the stage and stalls.

Perhaps the biggest difference will not be in the show but outside. There's no car park.

Instead, the 34,000 attendees are strongly encouraged to walk, cycle or get public transport - including on one of five special trains laid on to take people back across the south-west at the end of the bank holiday Sunday night.