Born Edward Harding, he was best known for his associations with the Spencer Davis Group, Axis Point, and Hardin & York.

[1] Hardin, along with the drummer, Pete York, left the Spencer Davis Group on 26 October 1968, due to 'differences over musical policy'.

Hardin continued as a solo artist, occasionally reuniting with York, much of his work from 1974 onwards was produced by Roger Glover who had recently left Deep Purple.

Hardin featured on Glover's solo project The Butterfly Ball and the Grasshopper's Feast that year, singing lead on the track "Sir Maximus Mouse" and playing on and co-writing others, most notably the hit song "Love Is All".

His best known work is perhaps his lead vocal on the theme from the Thames Television children's magazine series Magpie, recorded by the then line-up of the Spencer Davis Group under the pseudonym The Murgatroyd Band.