O&S(meme) - wombling free

You have to be of a "certain age" to remember the books by Elizabeth Beresford which led to a children's programme about a group of small, furry animals that lived in a burrow under Wimbledon Common and recycled rubbish into useful things.
[for the 1970s that was a very advanced environmentally friendly idea].

The TV adaptation had a theme song which included the line
"Underground, Overground, Wombling free"

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