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Mark Radcliffe reveals some backstage secrets from the world of rock 'n' roll touring with the help of the behind-the-scenes fixers known as contract riders whose development has mirrored changes in the music industry.

He talks to artists, promoters and agents about some of the strange demands made by bands, including rooms large enough to pitch a teepee in, vintage wine and macrobiotic food. With contributions from Rick Wakeman

, Ozzy Osbourne and former Led Zeppelin manager Peter Grant.

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Unknown: Mark Radcliffe

Unknown: Rick Wakeman

Unknown: Ozzy Osbourne

Unknown: Peter Grant.