The Royal family stayed in London during the Blitz
England suffered greatly during WWII. London, in particular, was badly damaged during the Blitz, the German bombing campaign. Even Buckingham Palace took some hits, but the Royal family refused to leave despite the Cabinet’s insistence that they do. That made them extremely popular with their people.
The Queen Mother was the principal mastermind behind this. She refused even to send her children away since she believed they should not be without their mother, and she would not leave the King. When the palace was bombed, she stated that she finally felt like she could look regular people in the face.