Derek Schofield posted links to the Polio and HIV / AIDS Radio ballads on a forum:
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The Body Blow https://www.youtube.com/watch?v=zK65LJvUCCU
The Enemy that Lives Within Available on Spotify and the CD is for purchase here: https://www.amazon.co.uk/Radio-Ballads-Enemy-Lives-Within/dp/B01MY18IHW
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sj