Work is "about halfway through" on the new record, says producer Andrew Watt
The frontman gave a special at-home performance for the VetsAid charity livestream
The version has been shared to celebrate the release of new film 'Sound Of Metal'
"Exit stage righttt, enter night"
"Metallica has been a huge influence and inspiration for us as music fans and musicians"
Taken from the all-star tribute concert to Peter Green earlier this year
The band appeared from home for the virtual performance
"I wouldn’t be sitting here talking to each other if it wasn’t for him"
Proceeds from the show go to the band's All Within My Hands Foundation
A productive use of time