Piers Morgan, 55, has slammed Laurence Fox, 42, after the actor accused him of “moral superiority” while they argued about coronavirus restrictions on Twitter.The spat between the pair began when the Good Morning Britain presenter told Laurence to “shut up” after he informed his 259,000 followers he had a “large group” of friends over to his house for lunch in spite of lockdown rules.Their row escalated this afternoon when Piers shared the latest Covid-19 death figures and called the 603 lives lost a “desperate heart-rending tragedy for their families”.Laurence then hit back at the journalist and said: “Not to forget the tens of thousands of avoidable cancer deaths as a result of lack of diagnosis and treatment.“Every one of them a.