Ever since the beginning of the COVID-19 lockdown in the UK, Queen Elizabeth has been holed up at Windsor Castle to stay safe, or in 99-year-old Prince Philip’s case, to make sure death doesn’t take him a day before his 100th birthday party. She and Philip took a brief summer break at Balmoral Castle in Scotland, then spent some time at her Sandringham Estate in Norfolk last month. She recently returned to Windsor Castle, while Philip hung back at Sandringham.