Out of curiosity, I've just been looking on the web for Beggars Bush and Bevington Bush. The former is apparently in Dublin, while Bevington Bush was/is in Liverpool: "the name of a thickly wooded valley between Bevington Hill and Everton Hill. An inn on Bevington Hill was called 'The Bush'." The area has not been 'thickly wooded' for many many years, but the area fits. As the version of the song quoted in the DT is that sung by the Irish Rovers, perhaps they changed the location to suited their Irish origins?

Joan