The other two (?) songs in The Young'uns and Boff Whalley on Kinder Scout video Geoff posted are THE GREAT TOMORROW , which isn't a Kinder Trespass specific song:https://www.antiwarsongs.org/canzone.php?lang=en&id=59515

And FROM BELOW by the Commoners Choir:
https://www.youtube.com/watch?v=oLkIlWD1PKs

https://www.commonerschoir.com/writing.php

Above link also has lyrics for For the Common Good (Magna Carta song).

From Below

Step by step…
With a compass and a cap
For a sing-song and a scrap
Are we bound by the lines upon the map?
Hell no!
‘Cos real change comes from below

Chorus:
From below, from below
Real change comes from below

It’s a place we call our own
From stone to boundary stone
Will they take away the right to roam?
Hell no!
‘Cos real change comes from below

Chorus

For every footprint on the land
For all the banners and the banned
Should we keep to the landlord’s plans?
Hell no!
‘Cos real change comes from below

Chorus

From below, from below
Real change comes from below
Down in the soil where the ideas grow
Real change comes from below

(Hope they don't mind!)