"Little Red Riding Hood Hit the Road" by Robert Wyatt, from one of my all time favourite albums "Rock Bottom". If you don't know it, you really should. Superb video by MrFantim too. "As we roll down the highway towards the setting sun."
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For the past week my commuting sdtk has been a shuffle of "Rock Bottom" & "Another Green World" and each time around this proves to be a highlight to the journey.