On Saturday, 13 July 2019 18:18:35 BST Mick wrote:
> or
> 
> xv -dc < /boot/EFI/... initramfs-XXX.img | cpio -idmv

Oops!  Typo alert!  xv should of course be 'xz'.  I think you can also use 
lzcat.

-- 
Regards,

Mick