Complex sentence: Upon entering the basement recording studio at SONS, it was noted that Ellwoods drumming was unproficient and hindered artistic creation within the band, he was promptly replaced by Eddie Gillespie a drummer from a Leek based band Silent Call.
Split into simpler sentences: Upon entering the basement recording studio at SONS, it was noted that Ellwood's drumming was unproficient at best, and a hindrance to the band. He was replaced by Eddie Gillespie a drummer from a Leek based band Silent Call.