I think there may be something about traditions associated with St Clement's day in Ronald Hutton's book "The Stations of the Sun: a History of the Ritual Year in England" (which is a very good read, by the way).

I'll check it out and report back tomorrow, if there are any references to songs.

Meanwhile, can someone enlighten me - why am I having to post as a guest all of a sudden? - Did someone just steal my cookie?

Wassail!