A previously unreleased version of Fleetwood Mac's classic Need Your Love So Bad has been released. The track features vocals recorded by Peter Green in his mother’s attic in the mid-1960s. It also has newly recorded guitar tracks by David Gilmour. It's one of two new versions of Fleetwood Mac tunes being released for the first time ever. The songs are appearing alongside a new book, Peter Green - The Albatross Man. It's coming out in October, in tribute to the late Fleetwood Mac guitarist. The second song features Metallica's Kirk Hammett playing on a version Man Of The World. This song also features Mick Fleetwood on drums.