Your version of Word has imported the HTML by parsing it and converted the content into a 'Word version' of the content.

Using Word to edit HTML directly is a lesson in pointlessness but you can get Word to open all the content so you see all the html tags by opening Word first and then using File > Open and changing the file type to "Recover Text from any file" and then opening the file. If you make any edits, you will need to save the document as 'text only' to avoid the content being converted into a non-raw-html format.

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Andrew Lockton
Chrysalis Design, Melbourne Australia