Complex sentence: Having moved to St George's Hospital Medical School, she was a senior lecturer from 1990 to 1995, and before being appointed Professor of Primary Care Nursing in 1996; this was the medical school's first chair in nursing.
Split into simpler sentences: Having moved to St George's Hospital Medical School, she was a senior lecturer from 1990 to 1995. She was appointed Professor of Primary Care Nursing in 1996; this was the medical school's first chair in nursing.