By Olivia Wheeler Ben Shephard admitted he was “desperately trying to hold it together” on his final Good Morning Britain show as co-star Kate Garraway said she was “off already”. It was announced last week that Ben, 49, and Cat Deeley were the new hosts of This Morning following Phillip Schofield and Holly Willoughby’s departures last year. This means that Ben will be leaving Good Morning Britain after ten years. Appearing on Friday’s show with co-host Kate, 56, for his final GMB show, the duo addressed his emotional exit and new role. Kate said: “It’s not even a minute past six, I just reali…