This is the Psalm for Palm/Passion Sunday by Paul Mason from Psalms For All Time. As usual for his music, it works as a stand alone song, which he recommends in Holy Week, during communion processions or for liturgies in times of trial – did I mention that his background notes would be worth the cost of the book even without the music.
If you pay attention he goes from F#minor to A major in the fourth verse to demonstrate a more hopeful feeling.
For this psalm he provides a piano arrangement, an organ arrangement and a choral arrangement for the fourth verse.
I’ve just found that if you don’t want to buy the whole collection, individual songs can be purchased for download from his website. You can also listen to three versions of the psalm there.
The text is the same as found in Kate Keefe’s setting here, but if you buy his collection they are all there.
My backing is, as directed, a mournful lament.