This is unique in that there are 9 images under a search result’s title and above the description. Here is a screen capture, furnished by Blogstorm:
In addition, it shows “17 images” in the snippet information, which indicates that Google understands that there are indeed a total of 17 images. The images on that landing page do seem significant to the rest of the page. I imagine that Google is thinking this page is more about image search than web search. I also do not think this has anything to do with the new rich snippet support because I don’t see the microformat code on the page and rich snippets currently only work in the US, not in Google UK.