Amiyaya
VIP Member
The Queen gave birth at home KC, PA, DoE at Buckingham Palace and Princess Anne at Clarence House. So it wasn't really "secret", just more private as there were no hospital steps shots. Also in the 1940s new mothers used to have more of a "confinement" and stayed in bed for a week or two after the birth.
But at least a notice was posted at BP signed by 2 doctors after the births
I believe the queen had ‘twilight’ births but I haven’t researched enough yet to be confident in that.