Complex sentence: In his spare time, Ridley studies bio chemistry at Nottingham University but mostly concentrates on performing songs from his forthcoming album in clubs all over the UK, (his most famous performance being as G.A.Y in September 2008).
Split into simpler sentences: In his spare time, Ridley studies bio chemistry at Nottingham University. But with most of his time Ridley turns to performing songs from his forthcoming album in clubs all over the UK, (his most famous performance being as G.A.Y in September 2008).