Prior to joining Hawkwind, Tree played with 2000DS, Plato's Jacuzzi, and his own band Bastard. He contributed vocals and bass to Bajina in 2000, with Dino Ferari (drums) and Judge Trev Thoms (lead guitar), and, also with Ferari and Judge Trev, recorded two new tracks for the Steve Took's Horns album Blow It!!!, the main body of which was recorded in 1977 at Pathway Studios, London, by Took with Trev and Ferari; that album was released August 10, 2004. His latest recording venue is providing vocals and bass for Trev (lead guitar and vocals), Jim Hawkman (synthesizer), and John Morgan (drums) with Mother Of All Bands (M.O.A.B.). Currently playing with Leeds-based band The Sewer Suckers, Tree is supporting bands such as My Older Ego in his home town.