Complex sentence: While working as an advertising executive in the mid- 1960s Skirrow commuted daily from Brighton to London, and he wrote 1,000 words a day until he had a 70,000-word novel.
Split into simpler sentences: While working as an advertising executive during the mid- 1960s, Skirrow commuted daily between where he lived in Brighton to where he worked in London. There he wrote 1,000 words a day until he had a 70,000 word novel.