A 26-year-old man is in a 'life-threatening condition' after overdosing on the class B drug ketamine at Glastonbury festival.
Police are warning festival-goers of the dangers of taking illegal drugs. The man's family have been informed.
Glastonbury founder Michael Eavis has defended heavy metal band Metallica's headline appearance at Glastonbury.
He claims they have been 'the keenest and most persistent' band ever to play at the festival.
Dolly Parton has showed her fans she's ready for Glastonbury festival as she tweeted a picture of her ticket.
Gates for the event opened this morning and thousands have already arrived, though the majority of acts don't start until Friday.
The country and western star will be performing on Sunday.
1 - Glastonbury is the world's biggest open air arts and music festival
2 - it began the day after Jimi Hendrix died, in 1970.
3 - The attendance was a comparatively minuscule 1,500 with a £1 entrance fee and the offer of free milk from Worthy Farm.
4 - Mick Ringham was the very first Glastonbury DJ is now an estate agent.
5 - Glastonbury uses about 3000 megawatts of electricity over a single weekend which is similar to the city of Bath.
6 - The Festival site covers 900 acres in the mystical Vale of Avalon.
7 - The main stage, Pyramid, is on a ley line that connects Glastonbury to Stonehenge.
8 - According to legend, Pilton, where Worthy Farm is situated, was once visited by Jesus Christ and his great-uncle, Joseph of Arimathea, on their way to the tin and lead mines nearby.
9 - The 1998 festival saw the invention of a new sport, mud-surfing.
10 - In 2005, there was two months' rainfall in a few hours, with car parks left under water and canoes used as transport.
Thousands of people have begun arriving at Glastonbury - although the festival doesn't start until Friday. Our correspondent Dave Woodland joined the crowds at Worthy Farm as the gates opened this morning.
Our reporter Bob Cruwys is taking no chances at this year's festival.
It's not even midday on the first day of the Glastonbury Festival but already finding a place to pitch is becoming difficult.
After queuing for hours many arriving at the festival decide it's time to give the legs a rest before the long trek to find somewhere to pitch.
People travelling by train to the Glastonbury Festival from London were given a special treat this morning, a performance by Gabrielle Aplin. The singer from Wiltshire was performing at Paddington Station as festival goers boarded trains to Castle Cary.