My sympathies, Steve. I understand your dilemma. I've suffered from sciatica for quite a few years and - though I'm not in any way disabled - no matter who or what the concert is, I will not attend one where I can't sit for some of the time. I'm happy to bop around for quite a bit of an evening, but continuous standing is impossible without back pain. Just a fact of life. When I play at a band ceilidh gig, I stand to play for the dances, then sit down between tunes while the caller puts the dancers through their paces.

I've missed some potentially good performances by great artists through it, but I just say - another time...