"Bellowhead visit a concert hall local to me from time to time. The first time they came it was a 'fully seated' performance,"

I have to say that I'd be very disappointed if I wasn't able to get up and pogo to Bellowhead - that's part of the fun for me but, fortunately, I still have full use of my legs (when sober, at least). For bands like them a half-and-half arrangement would meet everyone's requirements. I don't know about the Unthanks - I'm not a fan so I wouldn't be going anyway.