BBC newsreaders Clive Myrie and Naga Munchetty fought back tears as they delivered the news that their former “mentor, colleague and friend” George Alagiah has died aged 67.The award-winning journalist, who presented the BBC News At Six for the past 20 years, died on Monday from bowel cancer after being first diagnosed in 2014.Broadcaster Myrie became emotional as he paid tribute to Alagiah during the lunchtime BBC News broadcast, saying: “On a personal note, George touched all of us here in the newsroom with his kindness and generosity, his warmth and good humour.”He added: “We loved him here at BBC News and I loved him as a mentor, colleague and friend.“His spirit, strength and courage in the later years of his life is something his family can be so proud of. Journalism has lost a giant.”