James Martin has shared the three-word mantra that has helped him through his shock cancer diagnosis and gruelling treatment, during a rare update on his health.The TV chef was first diagnosed with facial cancer in 2017 and has been through a number of treatments since then, but in a recent appearance on ITV's Lorraine, he opened up on some good news about his health. He told how all was looking good in his recovery at the moment, and declared "onwards and upwards" as he shared the latest on his condition with host Lorraine Kelly.