Piers Morgan appears to have reignited his feud with Denise Welch, 63, after criticising her mental health advocacy work.The former Good Morning Britain presenter, 57, took to Twitter to slam Denise after someone called him out for making light of mental health illnesses.They wrote to the star: “Mental health is nothing to joke about!” Piers then replied: “I’ve got no time for mental health frauds like Denise Welch who cynically exploit MH for money & preach about kindness but are horrible human beings.” Denise has since clapped back, and accused him of “putting the cause back” by two decades. Get exclusive celebrity stories and fabulous photoshoots straight to your inbox with OK!'s daily newsletter. You can sign up at the top of the page.