The Crown episode “Wolferton Splash” was filmed in London in the United Kingdom.

What is meant by wolferton splash?

The first episode of the Netflix series The Crown is called "Wolferton Splash" because part of it takes place on a marsh duck shooting expedition from Sandringham House on which the king (Elizabeth's father) invites newly married Prince Philip.

Who is spitting blood in the crown?

They would also have been surprised to see Helena Bonham Carter's Princess Margaret – who was played by Vanessa Kirby in the first two seasons – undergo exploratory surgery after suffering health issues with her lungs. The scene preceding this shows her coughing up blood.