Complex sentence: Since its creation the Chorus has had a number of celebrated choir trainers including John Alldis, Arthur Oldham, Richard Hickox and Stephen Westrop, and most recently Joseph Cullen, who stepped down in October 2011.
Split into simpler sentences: Since its creation the Chorus has had a number of celebrated choir trainers including John Alldis, Arthur Oldham, Richard Hickox and Stephen Westrop. The most recent chorus master was Joseph Cullen, who stepped down in October 2011.