Complex sentence: At home, she was critical of her neighbours' treatment of their servants; the Rigbys had servants themselves, but allowed them certain unconventional freedoms such as being able to eat in the dining-room and not having to wear uniforms.
Split into simpler sentences: At home, she was critical of her neighbours' treatment of their servants. The Rigbys had servants themselves, but allowed them certain unconventional freedoms such as being able to eat in the dining-room and not having to wear uniforms.