Complex sentence: He moved to London when he was 17 to work as a scaffolder; at the time of his death, at the age of 47, he was working casually as a vendor for the "Evening Standard", London's evening newspaper.
Split into simpler sentences: He moved to London when he was 17 to work as a scaffolder. At the time of his death, at the age of 47, he was working casually as a vendor for the "Evening Standard", London's evening newspaper.