The American, who is known to be a fan of The Beatles, is understood to have been "very keen" to be involved in the gig on Sunday, June 1, that will also feature the rock stars Kaiser Chiefs.

The Culture Company had promised a "very special international superstar guest" for Sir Paul's concert, and Grohl, the former drummer of 1990s grunge band Nirvana, appears to be that person. - more on this story

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