IMHO one of the main difference between English, Irish, & Scottish trad is that in England folk music has almost been relegated to some old folk's thing. But with the Scottish and Irish music it still has very popular appeal with all age's and is sung all over. Not relegated to some dusty folk club but sung all over, in Ireland it can be herd instead of that terrible elevator music all over Dublin. As for the movement of songs from one place to another I have been trying to find out where "Lark in The Morning" originated for some years with no luck, I have come across variants from all three. Most young people in England if you ask them to name a folk band you will probably get the spice girls, or wet,wet,wet, or a blank look. All the best ferret