James Fagan has added a verse, which you'll find on the Melrose Quartet CD, Dominion. The Melrose Quartet is James, Nancy Kerr, and Jess and Richard Arrowsmith. The new verse comes between verses five and six of the Martin Carthy version. It goes like this (copying from the liner notes):

Build a drone, fly it, governments will buy it
Devils in the desert sand give us a chance to try it
Don't need their ident, propaganda strident
Blow them up remotely with a Hellfire or a Trident.

The 17th century original, posted by Malcolm Douglas way upthread, has several references that I would like to understand. I'll repost a few stanzas here [with my ignorance in brackets]:

Far from the gulpit
Of Saxby's pulpit,
This brought an Hebrew ironmonger
To the pulpit.

[Who was Saxby? Who was the Hebrew ironmonger? What historical event is this about?]

Such pitiful things be
More happy than kings be;
They get the upper hand of Thimblebee
And Slingsbee.

[Who were Thimblebee and Slingsbee? What's all this about, then?]

Down goes your law-tricks,
Far from the matricks,
Sprung up holy Hewson's power,
And pull'd down St Patrick's.

[matricks? Hewson? I suppose St Patrick's is the cathedral]

This sword it prevails, too,
So highly in Wales, too,
Shenkin ap Powel swears
"Cots-splutterer nails, too."

[The last two lines, anyone know what they mean?]

It batter'd their Gunkirk,
And so it did their Spainkirk,
That he is fled, and swears the devil
Is in Dunkirk.

[What's Gunkirk? What's Spainkirk? What happened there, and what's it got to do with the devil and/or Dunkirk?]

I'd appreciate any enlightenment. Thanks.