Your argument had resemblance from 2022 and only 1, no one before was a Reading main stage headliner. I'd question KOL in 2022 as well, I don't think they are getting Reading main stage now and were regarded on here as a boring booking in 2018 when it happened. The festival have also had multiple headliners booked after KOL were and returned in that gap.
I doubt he'd be headlining the acoustic. Only if it's just him and a guitar.
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But he will be touring with his band next year. He's playing stadiums warming up for Oasis and will be playing a greatest hits mix of Verve and solo hits.
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Be more like 4th down on Pyramid Sunday or 3rd Other Stage. Possibly headline Woodies.