Valentine started enjoying guitar as a teen rising up in North Shields, Northumberland, the label mentioned. After honing his expertise enjoying with different teams, Valentine was recruited in 1963 to type The Animals, together with Eric Burdon, keys participant Alan Value, bassist Chas Chandler and drummer John Metal.
Valentine stayed with The Animals for 4 years and would later be a part of a number of reunions. He launched a solo album in 1969. He performed with various teams in recent times, throughout which era he lived in Connecticut.