Thank you Ray.
If we have "£" in the database table field this renders as "£" in the validator which, even with htmlentities, produces the parsing error. The data is submitted using a textarea form field so I'm not sure why it's not validating properly.
https://validator.w3.org/feed/check.cgi?url=http%3A%2F%2Fwww.gallowayfisheriestrust.org%2Frss-fisheries-trust-news.php
Any idea what could be causing this?
Much appreciated
NJ