<Li> (19) Lena Tindall (b . 2018) </Li> <Li> Princess Margaret, Countess of Snowdon (1930--2002) <Ul> <Li> (20) David Armstrong - Jones, 2nd Earl of Snowdon (b . 1961) <Ul> <Li> (21) Charles Armstrong - Jones, Viscount Linley (b . 1999) </Li> <Li> (22) Lady Margarita Armstrong - Jones (b . 2002) </Li> </Ul> </Li> <Li> (23) Lady Sarah Chatto (née Armstrong - Jones; b . 1964) <Ul> <Li> (24) Samuel Chatto (b . 1996) </Li> <Li> (25) Arthur Chatto (b . 1999) </Li> </Ul> </Li> </Ul> </Li> <Ul> <Li> (20) David Armstrong - Jones, 2nd Earl of Snowdon (b . 1961) <Ul> <Li> (21) Charles Armstrong - Jones, Viscount Linley (b . 1999) </Li> <Li> (22) Lady Margarita Armstrong - Jones (b . 2002) </Li> </Ul> </Li> <Li> (23) Lady Sarah Chatto (née Armstrong - Jones; b . 1964) <Ul> <Li> (24) Samuel Chatto (b . 1996) </Li> <Li> (25) Arthur Chatto (b . 1999) </Li> </Ul> </Li> </Ul> <Li> (20) David Armstrong - Jones, 2nd Earl of Snowdon (b . 1961) <Ul> <Li> (21) Charles Armstrong - Jones, Viscount Linley (b . 1999) </Li> <Li> (22) Lady Margarita Armstrong - Jones (b . 2002) </Li> </Ul> </Li>

How does the heir to the throne work