Tobias "Bias" Boshell (born 20 July 1950) is an English songwriter and musician, best known as the founder of the folk rock band Trees.He was born in Wye, Kent, was educated at Bedales and the Royal College of Music. Tobias formed Trees in 1969 with Celia Humphris on vocals, Barry Clarke on lead guitar, Unwin Brown on drums/vocals, and David Costa on acoustic guitar & dulcimer.