It was working fine until the latest version, so I was assuming that it might have been an issue with this rather than the feed itself. Interestingly, the feed and reader mode works fine in other RSS apps, again pointing towards the latest version.
Interested if any one else has had issues - will limp on for now having to open the full ar5icle if I want to read it.
This isn’t due to a change in NetNewsWire. It’s just coincidence. It looks like they’re blocking the service we use for the reader view, unfortunately.