@pugmiester don't know if it's a your server problem or a me problem but when I tried to add your RSS to FreshRSS i got the following error:-
A feed could not be found at `https://martin.hatstand.org.uk/rss.xml`; the status code is `200` and content-type is `application/octet-stream` [https://martin.hatstand.org.uk/rss.xml]