Complex sentence: The son of a father who was a jeweller and skilled part-time art historian, his parents divorced when he was nine so his mother worked full time so that Leslau could be educated at a preparatory school in Hampstead, and at Mill Hill School.
Split into simpler sentences: The son of a father who was a jeweller and skilled part-time art historian, his parents divorced when he was nine. His mother subsequently worked full time so that Leslau could be educated at a preparatory school in Hampstead, and at Mill Hill School.