Metallica’s James Hetfield has shared details of what he’s been up to during lockdown, revealing that he’s used the time to write “tons of [new] material”.The metal band’s frontman has been at home in Colorado since the coronavirus pandemic hit the States in March and has used the unexpected time to stay creative.“For me – and I don’t wanna sound ungrateful because I know there’s a lot of people out there that are struggling because of this Covid,” he said during a SiriusXM Town Hall last week