The singer walked out on pals Gary, Martin Kemp, Steve Norman and John Keeble over a year ago.
He claims political arguments got in the way of the new romantic group and blew up after years of disagreement.
Pointing the finger at Gary, the 58-year-old said: “If ever there was a rub between two people in Spandau, it was between the two of us.
“It’s just two big personalities in a small space. “Politically we’ve never really seen eye to eye.”
DAVE J HOGAN/GETTY
Since the split, the dad of five has even penned a song which references the fights. Called What Am I? he claims the song was “a little bit autobiographical”.
He explained: “The song is about being your own person no matter who you are.”
Tony is a long-time supporter of the Conservative Party, and even spoke at their conference in 2007.
As well as politics, the star also said they split over disputes about his solo career, telling OK! that he was “forced into a no-win situation” because they were unhappy with his plans.
Despite the fallout, Tony insists he wants nothing but the best for Gary, adding: “I wish him well.”