I remember playing the Albion Dance Band LP when my grandad was around, and he immediately recognised 'Hopping Down in Kent' as a song he used to sing when he spent summers away from Pimlico (contrary to popular opinion, not all London hop-pickers were from the East End!), hop-picking in the Horsmonden area, probably in the 1920s/30s. Apparently, the words could be changed according to circumstances, they weren't set in stone.