Following on from another TES thread, School spending data for the whole UK 2009-10 is now available here. I had most luck downloading the zipfile version. It's clearly aimed at those who want to establish links between school 'performance' and different spending categories. However, one of the categories is 'Supply Teachers', showing spending per student in each school, and national and LEA averages. For supply teachers it will form an interesting benchmark (and evidence source?) for comparison with the 2010-11 figures when they are released, assuming any of us are still supply teaching by then. However, it might not distingush between Supply staff hired as specialists and those hired as CS. It makes interesting reading.