The Daily Star's FREE newsletter is spectacular! Sign up today for the best stories straight to your inboxPrince Harry has spoken out about the nation's mental health during the coronavirus pandemic in an emotive letter as he gave his backing to a children's charity.Harry is the patron for WellChild, a charity that supports seriously ill young people, and wrote to families they support as part of their impact report for 2020.The report also draws attention to the colossal strain the coronavirus crisis has taken on mental health for children, families, and medical staff.A nurse who works for WellChild wrote in the report: "This has been the hardest and saddest of years for lots of NHS workers, but on the days I myself am feeling low and miss.