You beat me to it.  I am almost certain, based on the date, that this is Bill Bruford and not Chester Thompson.  I don't think Chester joined them until 1977 and this would seem to be during the six months that Bill spent with the band in England in 1976.  And I agree that it does sound much more like Bruford than Chester.

It's interesting to me for having a live version of the instrumental section at the end of "Dance on a Volcano."