Complex sentence: Together with McGuigan's friend Bonehead, they formed a band called The Rain and hired Chris Hutton as their singer, but he was sacked and replaced by Liam Gallagher not so long after, whom McCarroll had also known through childhood.
Split into simpler sentences: Together with McGuigan's friend Bonehead, they formed a band called The Rain and hired Chris Hutton as their singer. He was sacked and replaced by Liam Gallagher not so long after, whom McCarroll had also known through childhood.