Roman Kemp broke down in tears live on air this morning as he paid tribute to his “absolute brother”, producer Joe Lyons, who died last week.The Capital Breakfast DJ shared his memories of his friend and colleague, saying: “I never thought I would have to be doing this on the radio.”Explaining his absence from the show at the end of last week, the 27-year-old told listeners: “Last Tuesday, very suddenly, we lost one of our best friends – and our colleague – producer Joe.