I've switched on some functions that I've been testing with Stu at LP Archaeology. You can use the new layers by clicking this icon in the top left of the map. To start with we've only added the POW Camps as that was the largest number - 371. They all now appear very quickly because the data processing has been taken away and replaced with dynamic image tiles from MapServer. I'm going to be adding a lot more layers soon so that it's easier to toggle multiple layers. I'm also working toward getting some other 3rd party data displayed in this way.