[Note 092.4]

The use of “Uncle Mac” to refer to Harold MacMillan was probably influenced by the popularity of “Uncle Mac” (Derek McCulloch) who presented programs for children that were broadcast by the BBC [ ref https://en.wikipedia.org/wiki/Derek_McCulloch]. Harold MacMillan was widely referred to as “Super-Mac” following his depiction as “superman” in a cartoon published in 1958.