The Mixtures – In The Summertime (1970)

As a result of the 1970 radio ban, during which many Australian radio stations refused to play Australian and British music released by major labels, the Mixtures recorded a cover of Mungo Jerry’s “In the Summertime” and received much more airplay than had initially been expected for a group on a small record label. The single went to #1 in Australia for six weeks.
Edited Extracts from Wikipedia®