Thank you so much for posting this. I was lucky to see Steeleye Span a couple of times "back in the day" when they were in their prime, when I lived in Boston, Massachusetts. Fantastic video.
I envy you. The current lineup is still quite a great live band as far I can tell from youtube although Tim Harts Dulcimer and Peter Knights fiddle are surely missed.
Their new fiddler Jessie Mae Smart is a great fiddler in her own right though. And the "young blood" (not only her, there are others as well) gives some nice changes to the sound even without Dulcimer ;)
Peter Knight now concentrates on his gigspinner projects where he combines folk tunes with afro beat, see this incredible rendition of "The King of the fairies":