The Guardian has a long read on Operation London Bridge: the secret plan for the days after the Queen’s death. "She is venerated around the world. She has outlasted 12 US presidents. She stands for stability and order. But her kingdom is in turmoil, and her subjects are in denial that her reign will ever end. That’s why the palace has a plan."
It's more than I, and probably you, ever wanted to know about the Queen's funeral plans, I made it about 2/3 of the way through it. You're milage may vary.