As the historicisation of Scotland’s pop story runs on apace, Blair Young and Carla J Easton’s study of the women too often written out of that history is a vital and necessary labour of love. From the 1960s adventures of Edinburgh sisters The McKinlays onwards, Since Yesterday talks to post-punk sheroes across the decades before pointing the way to the future in a mix of history lesson, personal essay and manifesto. Drawing from her own experience as the driving force of TeenCanteen, Easton’s narration unearths a hidden history of sisters doing it for themselves in a misogynistic music industry.

Post-punk auteurs such as The Ettes, Sophisticated Boom Boom, Sunset Gun and The Twinsets tell their stories, paving the way for 1990s homegrown mould-breakers such as Hello Skinny, Lung Leg, Pink Kross and Sally Skull, with the likes of The Hedrons picking up the baton. And let’s not forget Strawberry Switchblade’s bona fide pop stardom, as the only Scottish girl band to make the top 30, whatever TV chef Delia Smith might have thought. Grassroots DIY culture is much to the fore, from Pat Crook’s Vesuvius record label to latter-day collectives such as Amplifi, Hen Hoose and Popgirlz Scotland in a vital call to arms for riot grrrls everywhere.

Since Yesterday reviewed as part of Edinburgh International Film Festival; main picture: Peter McArthur.