Complex sentence: Max went on to develop his art in the magic clubs of London and also by performing street magic and is now a member of the world's premier magical society The Magic Circle and performed at the Circle's centenary celebrations.
Split into simpler sentences: Max went on to develop his art in the magic clubs of London and also by performing street magic. Max is now a member of the world's premier magical society The Magic Circle, and was invited to perform as part of the Circle's centenary celebrations.