Glastonbury festival weather: sun, thunder and sludge

It's the afternoon on the first day at the festival, and the clouds are already forming. Festivalgoers are making the most of what little sun is around ... Photograph: Joel Ryan/AP

The weather changes and the clouds become ominous above Worthy Farm Photograph: Yui Mok/PA

Lightning strikes! A storm breaks before the festival has even properly begun Photograph: Anthony Devlin/PA

June: Lightning flashes at the Glastonbury campsite Photograph: Anthony Devlin/PA

After forgetting their tent (d'oh!) one of these poor souls must bravely become a human tent-replacement Photograph: Anthony Devlin/PA

Ah, good old British stoicism – ignore the weather, and hope it goes away. But two chaps have given in! You'll only encourage it Photograph: Anthony Devlin/PA

Judging by the boy scout level of preparation here, these guys were expecting a bit of drizzle. Plus more pockets for cans of beer. Nice Photograph: Anthony Devlin/PA

Security guards hold an evening meeting before going on patrol. 'For the third time Barry, no our uniforms are not waterproof.' Photograph: Luke MacGregor/Reuters

Oi! This is expensive camera equipment we're using here. You try picking mud out of the lens of a digital SLR Photograph: Yui Mok/PA