Hi there! There are around 7,500 files on an OGL here on the RCAHMW's website. They're all part of the European funded Cherish Project, and are mostly high res images of coastal iron age forts in Ireland and Wales.
Can someone upload all files to Commons, please? I've tried, using the above 1st link, but I'm getting an error message: Error generating parser UI initialization data for XML file.
Cheers!
Anyone please? 
these are wonderful images, greatly needed on WP.
I've had several goes at different approaches to getting the right URLs for the images and although I've made a little progress, it doesn't seem to be straightforward and ultimately I can only find a way of getting the watermarked thumbnails.
Despite the OGL, it doesn't look like these images are being made easily available for mass download/reuse - it looks like there is an expectation that they will be downloaded on an individual basis with a reason given for each download. There does seem to be an API behind the scenes (e.g. you can do a request like https://rcahmw.ibase.media/en/api/v2/items?WINID=1717663226532&fields=assets(original%2Cstream+reference)) but I can't find any documentation. You may have already tried this but if the publishing organisation were to cooperate then you might be able to get access to what you need much more easily - so it may be worth reaching out to them, or to a wikimedian working in this area (e.g. Jason Evans https://www.linkedin.com/in/jason-evans-a265ab6b/ at the National Library of Wales, or Andy Mabbett User:Pigsonthewing - Wikimedia Commons who has done a lot of work with Wikimedia and cultural heritage organisations) to see if they can facilitate anything here.
Thanks for your hard work. The organisation (Royal Commission...), yesterday, have informed me that they will give each image an unique URL, in around a month. Everything should, then, be straightforward. AI does a good job of clearing watermarks, of course, but not having them in the first place is the ideal way forward. Cheers!