I have just got this e-mail from Maggie:

"In the last verse of 'A Place called England' I have in mind the St George's Hill Diggers - in fact when I do the song on gigs I usually include Leon's 'World Turned Upside Down' earlier in the same set. Thus:

"'We shall plant the seed they saved us, common wealth and common ground.'

"Swampy Daniel and Muppet(?)Dave indeed make an appearance, but only in the 5th verse."

So thanks, Stigweard and Countess Richard, another aspect of the genealogy of the song which I hadn't suspected.