This is the second movement
Andante quasi adagio of McEwen's
Symphony in A minor composed between 1895 and 1899 and published in 1903 in a String Quartet adaptation due to it not being performed in its orchestral version. The chief subject of the movement is a traditional fiddle tune
The Arran Boat Song [
information derived from Alasdair Mitchell's 2002 PhD thesis].
Publicity about the performance states
"the concert promises to be particularly notable for its rendition of John Blackwood McEwan's Symphony in A Minor, of which this performance is the English Premiere!" (see:
https://www.dur.ac.uk/whatson/event/?eventno=9084)
The String Quartet adaptation
String Quartet No.2 in A minor is available on the Chandos CD of Volume 3 of McEwen's String Quartets with the Chilingirian Quartet.