The answer, my friends...

 Just been to see Julie Felix at the Mission Theatre in Bath. (If you've never heard of her, go look her up. Proper old-school veteran hippy with a great line in protest songs).
She's amazing - 72 and still able to get a room full of middle-aged Brits singing "Blowing In The Wind" and "Peace Is A River." And do a high kick above her head. Dude, I can't do that.