Complex sentence: He formed the band "Instigators" with his school friend Simon Mooney (Guitar) and after Simon Bridgewater (Vocals) and Simon Elsey (Bass) joined they made some demo recordings at Lion Studios in Leeds.
Split into simpler sentences: He formed the band "Instigators" with his school friend Simon Mooney (Guitar). After Simon Bridgewater (Vocals) and Simon Elsey (Bass) joined they made some demo recordings at Lion Studios in Leeds.