As a Londoner myself, although not, technically a cockney, I agree with Faldo's etymology. There seems, also, to be some conection with "the land of Cockayne," but I'm not too sure just what that involves. However, it woukd appear to be a place of ease and plenty, significantly a land where there is no shortage of food - a very important motivation for the poor of London. An absence of people overlooking and regulating your life and no restirctions o your "liberty" seem to fiogure large in tale of this fabled land.

I'm immortal until proven otherwise