If you thought that the only musical export from Sweden was the over-produced Abba singing meaningless nonsense, you need to reappraise. Not only was Bo Hansson riding the golden age of progressive rock, it was the Swedes who resurrected the genre and began the ‘third wave’, not just as ‘prog’ but as genuine progressive rock in the 90s. Bring on the Bo Hansson, Anekdoten and Änglagård T-shirts!

There’s an almost unspoken agreement that jazz-rock fusion comes under the prog umbrella. This relationship, forged in the late 60s and...