Something of an out-there tangent this, but would it be worth considering a session or display of some kind exploring traditional type music from the various immigrant communities too?

I'm aware that there is quite a lot of sympathy for the BNP in Walton, as such a folk festival might possibly represent an opportunity for some valuable cultural & community exchange?

If you thought it worthwhile to explore the idea - without 'politicising' the event - you could consider seeking further advice from the team at Folk Against Facism:

http://www.folkagainstfascism.com/