I feel like the terms are interchangeable in certain contexts. Like I know about Alfred the Great who basically turned Wessex into an AngloSaxon spelling of what we today call England. I think Cnut described himself as King of the English.

When William the Conqueror became king the language and culture of England would be considered Anglo Saxon. The new Norman nobility would influence Anglo Saxon language and culture.

Eventually the language of modern English forms. People of the state of England refer to themselves as English. I know Anglo Saxon is still used in context as an ethnicity and culture.

So I'm generally asking someone to delineate in what ways a group of Anglo Saxon kingdoms who had Anglo and Saxon ancestors as members of those kingdoms became English culturally and ethnically?