To join in the chorus, I'd add that a part of their absolute magic is the easy, relaxed tempo in which they presented their songs. Not hurried and with plenty of time to find a harmonious bit. Wonderful, honest singing without being over-theatrical at any point. Wow!

The only down side was that they, including Bob at 82, must have gone through 3 or more pints each on stage just as if they were sitting round in their local while the audience was dry. And we call that civilized? Do we or do we not need a better grade of folk venues and taverns?