I was going to break traditional down regionally but I assume English trad will be the priority of an English club, Scottish north of the border, Irish, Welsh, etc., so left No 1 as Traditional.

There's also the problem of exclusively Trad. Eng. being easier to prove lyrically than musically and as I don't believe there's such as thing as English music, only regional English sounds, it seemed too much faff.
If the pecking order took on Linnaean categorisation I'd top it with revenge ballads played on concertina and bass brass.