The song's lyric video was made in collaboration with People of The Streets, an organization that seeks to meet the needs of people experiencing homelessness.
A wait of almost eight years from Rod's first break to his first UK chart-topper ended in October 1971.
A lavish new box set from Universal celebrates the original BBC session recordings by the pioneering musical visionaries Van Der Graaf Generator.
The Oval hosted a memorable rock event in 1971 headlined by The Who and also featuring the Faces, America, Lindisfarne and Mott The Hoople.