The Moody Blues star’s record label confirmed his passing, announcing that he died “suddenly” on Thursday.
The statement read: “It is with profound sorrow and sadness that Cherry Red Records and Esoteric Recordings regret to announce that Ray Thomas, founder member, flautist and vocalist of the Moody Blues, passed away suddenly at his home in Surrey on Thursday 4th January 2018.”
Ray was one of the founding members of the rock band, but took a back seat after his heath deteriorated in 1999.
Later in 2014, he announced that he had prostate cancer.
He wrote in a statement at the time: “My cancer was in-operable but I have a fantastic doctor who immediately started me on a new treatment that has has 90% success rate.
“The cancer is being held in remission but I’ll be receiving this treatment for the rest of my life. I have four close friends who have all endured some kind of surgery or treatment for this cancer and all are doing well.
While I don’t like to talk publicly about my health problems, after Alvin [Stardust]’s death, I decided it was time I spoke out.
“A cancer diagnosis can shake your world and your family’s but if caught in time it can be cured or held in remission. I urge all males to get tested NOW. Don’t be put off by thinking it won’t happen to me.
“It needs to be caught early. It’s only a blood test – a few minutes out your day to save yourself from this disease. Love and God Bless, Ray.”