The ex-Police frontman and rock icon will headline the festival tonight, before Insomnia hitmakers Faithless will close the Main Stage.
The Main Stage will be opened by Wigan indie outfit Lottery Winners, followed by Scottish singer songwriter Amy Macdonald and The Corrs.
Meanwhile, at the Big Top, the day kicks off with Portsmouth’s Crystal Tides followed by Twin Atlantic and Amble.
Wigan’s The Lathums will then take to the covered stage, before Dean Lewis and headliners Clean Bandit.
On the River Stage, ex-Kasabian frontman Tom Meighan will play the first of two sets, alongside Nofun!, Daydreamers, Fitzpatrick, Sophie Grey and Toby Lee.
Main Stage schedule: Friday, June 20
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Lottery Winners: 4.10pm – 4.55pm
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Amy MacDonald: 5.25pm – 6.10pm
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The Corrs: 6.40pm – 7.50pm
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Sting: 8.30pm – 10pm
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Faithless: 10.40pm – 11.55pm
Big Top schedule: Friday, June 20
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Crystal Tides: 4pm – 4.40pm
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Twin Atlantic: 5.10pm – 5.50pm
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Amble: 6.20pm – 7.05pm
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The Lathums: 7.45pm – 8.30pm
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Dean Lewis: 10pm – 11pm
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Clean Bandit: 11.45pm – 12.55am