Here's what I pieced together from a couple of sound samples:

HARRY BREWER
(Nick Burbridge)

...shore
Where thousands of poms (?) with their rattling guns
Made you march through the battery's roar.

CHORUS: So where are you now, Harry Brewer?
You're lyin' in some dirty hole
With the sun beatin' down on the ol' battleground.
May God give a rest to your soul.

There are officers safe in the barracks...

There are hundreds who'll beat on the drums
And thousands who'll carry the guns,
But if you must die of torture 'tis better to fall
For the rights you'll hand down to your sons. CHORUS

North Sea Gas, Dark Island, Scotdisc CD 689, 2003.
Levellers, World Turned Upside Down, Hag 006.