5 Notable "Heirs and Spares" in the British Royal Family

The queen was a 10-year-old princess when her future was suddenly very clearly laid out by her uncle's abdication, but the role of her younger sister Princess Margaret was less defined. For a time Margaret took on a raft of patronages and went out on a stream of tours and public engagements, before settling into the life of a royal wife and mother.

However as her life progressed, she became known more for her decadent social life and romantic entanglements, while her royal engagements dwindled along with her health, and as the queen's children took on more responsibilities Margaret's royal role became increasingly redundant.