Dancing on Ice star Brendan Cole has opened up about his once-in-a-lifetime visit to Buckingham Palace during which he may have broken royal protocol.MORE: Brendan Cole pens heartfelt tribute to 'incredible talent' after tragic lossThe former Strictly Come Dancing pro was attending a tea dance hosted by the Duchess of Cornwall in November 2017 when he grabbed the opportunity to ask Prince Charles' wife to dance. "When it happened, I probably broke protocol a little bit. I didn't really know," Brendan told HELLO! at the time.WATCH: Dancing on Ice's Brendan Cole practices with his daughter in heartwarming clip"We'd finished the group dancing for the day.