Here's an extra bit cribbed from : http://www.worldofyak.com/flops/flops.cgi?page=lyrics&for=old-man-dustman

(I've left out the patter from between the verses)

Now here's a little story
(To tell it is a must)
About an unsung hero
That moves away your dust.

Some people make a fortune,
Others earn a mint;
My old man don't earn much:
In fact he's flippin' skint.


Trevor, The last chorus I'd always heard was nearer:

My old man's a dustman,
He wears a dustman's hat,
He wears cor-blimey trousers
And he lives in a council flat.
So next time you see a dustman
Looking all pale and sad,
Don't kick him in the dustbin:
It might be my old dad.

And are you sure it's "nabob"? Again, I've always heard it sung as "'nana" (That the folk process, I supose).

Regards

Walrus^^^