Glastonbury 2015: Libertines confirmed to fill Florence + The Machine's old Pyramid Stage slot

The band announced the news in an new Instagram account

The Libertines are not currently on the Glastonbury line-up but may be making an appearance on Friday evening (Getty Images)

The Libertines have confirmed they will be playing a not-so-secret set at Glastonbury.

The band have been hotly tipped to replace Florence + The Machine on the Friday line-up after the band were drafted in to replace the Foo Fighters.

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The Libertines announced the news in an Instagram account that appears to have been set up especially to confirm the rumours.

Organiser Emily Eavis confirmed that a band will be performing during the slot left vacant by Florence + The Machine, but in the name of anticipation and surprise, refused to give anything away.

"There is definitely something filling that gap but under no circumstances will it be announced," she said. "Luckily it's been a proper secret, a proper surprise, which actually is quite hard to do now because things get out."

The Libertines were booked to play the Pyramid Stage in 2004 but had to pull out and were replaced by Supergrass. They played the Other Stage to wide acclaim in 2003.