Radio astronomy pioneer dies at 92 • The Register
In the 1950s, under a team led by Bernard Mills, Slee and colleagues Alec Little and Kevin Sheridan made observations which brought them into conflict with Hoyle, and which helped the “expanding universe” model supplant Hoyle's “steady-state” model.
Slee's earliest training came during World War II, when he worked as an aircraftsman and trained in radio mechanics and radar mechanics. That led to his interest in radio-astronomy: as sergeant in charge of a radar station near Darwin, he observed solar coronal radio emissions at 200 MHz.