Complex sentence: Waller studied at the Royal College of Art, London, 2001-2003, and before that studied to be an illustrator at Hereford College of Arts and Design 1997-2000.
Split into simpler sentences: Waller studied at the Royal College of Art, London, 2001-2003. Before the Royal College he studied to be an illustrator at Hereford College of Arts and Design 1997-2000.