5 royal baby protocols and traditions – but who broke the rules? Prince Harry and Meghan Markle chose unusual baby names while Princess Eugenie’s birth was announced on Instagram

• The baby name X Æ A-XII à la Elon Musk wouldn’t fly in the British royal family – Archie Harrison and Lilibet Diana were already enough to cause a stir
• Royal births are announced on a gold easel in Buckingham Palace, by the town crier – and nowadays on social media too