1. Interaction Centre; University College London; Malet Place Engineering Building (8th Floor), Gower Street London WC1E 6BT UK
2. Human Factors Research Group; Faculty of Science; University of Nottingham; Geospatial Building, Jubilee Campus, Wollaton Road Nottingham NG8 1BB UK
3. School of Electronic Engineering and Computer Science; Queen Mary University of London; Mile End Road London E1 4FZ UK
4. School of Informatics; Department of Computing; City University London; Northampton Square London EC1V 0HB UK
5. Human Factors Research Group; Faculty of Science; University of Nottingham; Geospatial Building, Jubilee Campus, Wollaton Road Nottingham NG8 1BB England
6. Visual Research Centre; Dundee Contemporary Arts; University of Dundee; 152 Nethergate Dundee DD1 4DY Scotland