Thanks, Simon.
I’m not sure what I’m doing wrong but even after deleting the topics they return with the same issue. An example image URL is https://waspsholdingstore.blob.core.windows.net/media-cached-prd/b/5/f/a/2/6/b5fa26b1309701c3411b30433b113d189569b98a.jpg and so I’ve added waspsholdingstore.blob.core.windows.net to the disabled image download domains setting. I’ve also added wasps.co.uk which is the domain the used in the raw RSS feed (looks to 301 to this windows bucket).
Is there a more final way to delete a topic that I need to try to ensure this is not a cache at work?