With his band The Mindbenders, the Manchester-born singer broke into the UK top five in 1964 with Um, Um, Um, Um, Um, Um.
They hit number one in the US and number two in the UK the following year with Game Of Love.
But he left to go solo later that year, reputedly quitting in the middle of a concert.
After going solo in 1965, he went on to have top 20 hits with Pamela Pamela and Come On Home.
