On 1978: The Year The UK Turned Day-Glo, we investigate the sounds of 1978 as the original punk template fractured into a dazzling day-glo riot of sub-genres: new wave, post-punk, proto-Oi, power-pop, punk poets, the mod revival, ska-punk, synth-oriented electronic/industrial music and a whole load of additional noises that, over forty years later, have still to be classified by the fifth estate, the fourth column or even the Third Reich. We document various regional scenes, paying close attention to the likes of Manchester, Scotland and, in particular, Northern Ireland, where the arrival of punk was a life-affirming relief from the horrors of everyday life.

The Jam's enduring, eternal popularity in the U.K. meant an ever-increasing number of archival releases that cropped up over the years, with Live Jam, a fine counterpart to the other official concert album, Dig the New Breed, turning up in 1993. Like that earlier effort, it draws together a slew of tracks from shows ranging from 1979 to 1982, including some cuts from the band's almost-farewell headlining bows at Wembley Arena. Quite happily, there's no track overlap at all with Dig the New Breed, making the two perfectly complementary recordings in ways. The real treat, thanks to the expanded space on CDs, is the inclusion of nine songs from two December 1979 shows in London, the best portrait of what an actual specific show must have been like.

Extras offers 26 B-sides, rarities and unreleased tracks that, while far from complete (the wonderful "See Saw" is absent, for instance), is a fan's dream come true. This is a fans' album, to be sure, but for fans, the never-before-heard demos (like "Burning Sky" and "Thick As Thieves") have a certain spine-tingling effect, and the covers (like "So Sad About Us," "And Your Bird Can Sing," and "Disguises") are undeniably fun – often more so than the covers they chose to include on the proper albums. Extras is not a good introduction, to be sure, but for the converted, this is essential.