One popular nickname for England is Old Blighty.
This affectionate term has an interesting history. It originated during the Boer War in South Africa. However, it gained widespread recognition and popularity among soldiers and civilians alike during and after World War I, primarily in Western Europe. "Blighty" essentially became a term of endearment for England, often used by those serving abroad, especially when referring to home, safety, and comfort.
While "Old Blighty" is a well-known nickname, England has other less common or regionally specific nicknames. However, "Old Blighty" remains the most historically significant and widely recognized affectionate name for England.