Home Secretaries and Archbishops at the Birth
In the old days, it was tradition to have the home secretaries present for royal births. The last time this happened was the birth of Princess Alexandra (pictured) in 1936. The Home Secretary Sir William Joynson-Hicks rolled up to the Queen's own birth in 1926, even though at that point she wasn't going to be Queen. Luckily for the Duchess of Cambridge, the Queen's father, George VI scrapped the custom just before his daughter was about to give birth to Prince Charles. Otherwise the Duchess could have expected Theresa May to drop in.
The Archbishop of Canterbury also won't attend the birth, as was the tradition in the past.