The story of how Kenny Everett’s constant lampooning of the Bee Gees proved to be “…the death knell for the band who took disco to the masses as a serious proposition for years to come.

However, if you’re not overly bothered about Clive Dunn’s life story or the trials and tribulations of Hot Chocolate and Hector, you can easily dip into the book with the help of the exhaustive index to find your favourites, be they Slade, Steeleye or Showaddywaddy. Writing about Sweet producer, Phil Wainman, he quips “…he favoured rhythmic thumps so brutal they sounded like a cave-dwelling Neanderthal mum banging on a couple of rocks to let her kids know it was time to come home for some roast woolly mammoth. Against a rainy, smog-filled backdrop of three-day weeks, national strikes, IRA bombings and the Winter of Discontent, this unending stream of novelty songs, sentimental ballads, glam-rock stomps and blatant rip-offs offered escape, uplift, romance and the promise of eternal childhood - all released with one goal in mind: a smash hit. The decade of polyester and cheese is bookended by the huge hit singles ‘Grandad’ and ‘There's No One Quite Like Grandma’ and while it's hard to find much or anything to appreciate in either of those records, Hodgkinson has, on the whole, made a decent case for "bubblegum as high art.

Hodgkinson displays a historian’s attention to detail throughout, but In Perfect Harmony is never dry or taxing and is peppered with the wit and wisdom of the protagonists and the author’s own humorous observations.

The reasonably minded are now picturing Hill, perhaps dressed as a nun from outer space, and nodding. We are also treated to a rollercoaster revisitation of the wider popular culture of the time with references to the comforting presence of Morecambe and Wise, Delia Smith, Tommy Cooper, The Good Old Days and Tiswas as well as the more sinister presence of Jimmy Saville, Gary Glitter, The Black And White Minstrels and Love Thy Neighbour; a reflection of a rich melting pot beset by the thinly veiled tensions which epitomised the times. During the era of the three-day week, strikes, and - Oi, Oi - energy shortages, British ears turned en masse to cheery and optimistic fare, and who could blame them?

In Perfect Harmony takes the reader on a journey through the most colour-saturated decade in music, examining the core themes and camp spectacle of '70s singalong pop, as well as its reverberations through British culture since. Someone had to explore the geopolitical significance of Chirpy Chirpy Cheep Cheep by Middle of the Road. While Hodkinson makes sterling efforts to compartmentalise the information into chapters defined by genres and age groups (The Great Taste Of Bubblegum, Kids, The Disco Of Discontent etc), there are inevitably overlaps and the author often goes where the story takes him, resulting in an organic and fluid read.