Oprah could not believe the size of the home when she visited for tea. Credit: Steve Back/Getty ImagesThe GistAt 1,324 square feet, Nottingham Cottage is one of the smallest properties in the Crown Estate’s portfolio.The cottage once served as Prince Harry’s “bachelor pad” during the 2010s.Prince William and Princess Kate lived in the grace-and-favour property as newlyweds.Everyone gets their start somewhere—even the British royal family. Before…