Eavis promises more surprises in '09.

Emily Eavis has denied reports that the Glastonbury Festival will return to its roots in guitar-based music next year, describing this year's event as a "great success".

Despite the festival struggling to sell out, with some citing a varied bill that included rapper Jay-Z as the main cause of the slow ticket sales, Eavis is determined to continue to experiment with the festival line-up.

Admitting that the build-up to the festival had been a "turbulent" period and that finally selling out was a "huge relief", Eavis says, "There were so many risks involved in this year's festival, but at some point you have to take risks and it was definitely the right time for us to take some after last year's festival, but it all paid off.

"There is no way we are going to go back to the same formula, we are taking all the best things from this year and will run with that; that is what makes Glastonbury so different."

Despite both Coldplay and Radiohead being touted in the media as likely headliners at Glastonbury 2009, Eavis emphasises that no firm decisions have been made and, when they are, they will not be obvious choices.

"With the huge influx of festivals and with so many bands doing the same thing, we have to offer something different because we can't compete with the huge commercial events," says Eavis.

Emily Eavis has also confirmed that she will continue to work closely with her father Michael to pick an eclectic array of acts. "At the moment it works really well. The dynamic is very good and no one knows which bits I do and which bits Michael does, except for the Jay-Z thing because it became so high-profile."