Complex sentence: In March 1931 she became engaged to Allan Webb, a budding actor and opera singer a few years her junior, the son of a cricketing parson and the grandson of Allan Becher Webb, a former Bishop of Bloemfontein and Dean of Salisbury Cathedral.
Split into simpler sentences: In March 1931 Gibbons became engaged to Allan Webb, a budding actor and opera singer a few years her junior. He was the son of a cricketing parson, and the grandson of Allan Becher Webb, a former Bishop of Bloemfontein who served as Dean of Salisbury Cathedral.