Glastonbury organisers are refusing to name a "top" act who are appearing over health and safety concerns.

Michael Eavis and daughter Emily Eavis, who book bands for the world-famous music event - which takes place in Somerset next month - say they have booked a "huge" band but are scared to let fans know who the mystery act is in case they attract too many people wanting to watch their set.

Emily Eavis revealed to BBC 6 Music: "There's a really top surprise on The Park stage which will definitely not come out because otherwise we'd have a health and safety issue. You can start guessing.

"I don't think it will ever be announced. It will just happen for those people that happen to be there, hopefully for the people that are fans of the band."

This year's Glastonbury will be headlined by Bruce Springsteen, Neil Young and Blur.

Other acts on the bill include Lily Allen, Crosby, Stills and Nash, Status Quo, Will Young, The Prodigy, Kasabian and Fleet Foxes.