James the Third

In 1936, the Duke of York unexpectedly became King George VI, and his ten-year-old daughter, Princess Elizabeth, became heir presumptive. However, she was never heir apparent, because a male sibling would automatically assume her place in the line of succession. So what would have happened upon the late arrival of a baby brother for the grown-up Princesses Elizabeth and Margaret? After King George VI's death in 1952, the United Kingdom's next sovereign would have been a very young boy, and ...