This is just the chorus of a longer song by Kate Thomas, which has been sung widely during XR, COP26 and ongoing climate emergency protests.
You can hear Marcus sing the chorus here:
Or listen to an MP3 here: Let Us Stand mp3
Tune (high): Let Us Stand tune (high)
Harmony (low): Let Us Stand harmony (low)
Here is another video of the chorus sung by Louise Blackburn: YouTube
You can hear the whole song here, sung during lockdown by Bradford Voices: Bradford Voices on Facebook
You can connect with more of Kate’s music here: Kate Thomas profile at the Natural Voice Network