The Critics Group has been played on NTS in shows including The Trilogy Tapes, featured first on 14 November 2016. Songs played include Sweet Thames Flow Softly, Sweet Thames Flow Softly and I'm A Girl Of Constant Sorrow.

The Critics Group, also known as The London Critics Group, was a group of people who met to explore 'how best to apply the techniques of folk-music and drama to the folk revival' under the direction of Ewan MacColl and Peggy Seeger, with some participation from Bert Lloyd and Charles Parker. Running for eight years from the mid-1960s to the early 1970s, it was not a conventional musical group as it had no permanent line-up.