One can only admire how the Tyneside group have evolved from their English folk roots to become a cultural phenomenon, charting Northumbrian history from navy press gangs to shipbuilding glory and destitution. Along the way, they have embraced songs by Robert Wyatt and Molly Drake, and added a keen strain of chamber folk to the tender vocal harmonies of Unthank sisters Rachel and Becky. National treasures? Absolutely.

Lines is a trilogy of short albums (available singly or as a set) that maintain their ambition, respectively focused on the poems of Emily Brontë, those of first world war writers, and a Maxine Peake drama celebrating Hull fishworker and campaigner Lillian Bilocca.

The Brontë set is the obvious headliner, setting Emily’s poems to music and recording them at the Brontës’ parsonage home using their regency piano. It’s haunting – Emily seems half in love with easeful death – but less resonant than its companions. The Sea Is a Woman, with lyrics by Peake, has Rachel Unthank at her most poignant. The first world war set features singer Sam Lee and a string accompaniment for a Siegfried Sassoon poem. The piano arrangements of Adrian McNally sometimes fly, sometimes plod, but the ethereal sibling harmonies rarely falter.