Steve Diggle hasn’t spent this long away from a stage in 40-odd years. For the Buzzcocks guitarist, like everyone else, 2020 was a year of thwarted plans. Instead of touring Britain and America, Diggle spent the year in ‘self-analysis’ and writing a new album. What else for an ageing punk to do? Except, of course, curate your legacy, grapple with the past.