Per the Wiki: Brand X started in 1975 as a “jam” band signed by Island Records’ Richard Williams. The initial lineup consisted of John Goodsall, Percy Jones and Robin Lumley, along with guitarist Pete Bonas and drummer John Dylan and later Phil Spinelli. Genesis drummer Phil Collins replaced Spinelli and in early 1976 Unorthodox Behaviour was released to coincide with an extensive UK tour. Collins had previously taken over lead vocals from Peter Gabriel in Genesis starting with the 1976 album A Trick of the Tail. Due to Genesis schedules conflicting with those of Brand X, Collins would depart the band on several occasions, before departing permanently in 1979.
Here’s their first studio Album “Unorthodox Behavior”
One of the few videos of Phil playing with Brand X