Former “The Great British Baking Show” judge Prue Leith revealed she was hospitalized after losing her sight and speech. “A few weeks ago, staying in Yorkshire, I had a migraine attack,” the 86-year-old wrote in her column Prue’s News in the September issue of The Oldie magazine, which is out on Friday, according to The Sun. Leith said she lost “half” of her vision before “a bright circle of flickering, colored lights” appeared in the upper right field of her eyesight. The reality star told her husband John Playfair, she was only having a migraine, but her “incomprehensible jumble of disconnected words” convinced him that she was suffering…