National Health were one of those rare English progressive bands whose classic mid-'70s output still sounds fresh today. Their sound prospered on imaginative linear musicality, often in a jazzy format that emphasized extended instrumental solos. Arising during a challenging time when progressive rock was being overtaken by a tidal wave of punk, National Health featured members of other Canterbury and post-Canterbury bands Hatfield and the North (a band considered a Canterbury supergroup in itself), Gilgamesh, and Henry Cow. After the release of 1977's debut album National Heal...