Glastonbury founder Michael Eavis has expressed concerns that the festival has become "too middle-aged" and "respectable" and is looking to attract more teenagers in the future.
"We're trying to get the youngsters back – the 16, 17 and 18-year-olds -because numbers were down this year," Eavis said.
"People say we're getting middle class, which is stretching it a bit far, but we're attracting a lot more people in their 30s and 40s and need to get the Radio 1 and NME crowd back in.
"These kids add so much to the flavour of it and should have a lot of fun but we're getting the 30 and 40-year-olds in, which changes the character of it.”
"The demographic is changing and it's slightly worrying. We might lose the fascination the show has for the public.”
"The people who now come have the right attitude, they grin and bear the mud. They're fantastically well mannered and polite, and respectable, but they do change the nature of the show."
Eavis admitted that Glasto’s internet-only sales gave older festival-goers and advantage over teenagers when it came to snapping up tickets.
"They're likely to be older people, with the money for the fast [internet] connections.”
Next year he plans to make 40% of tickets available through phone lines to allow teens “to use their mobile phones to get tickets."
Earlier this year 137,500 tickets were sold in the record time of one hour, 45 minutes.
Coldplay, U2 and Beyoncé are headlining at this year’s festival, the biggest in its 37 year history but bad weather has already turned the site into a mudbath.