School of Computer Science, University of Manchester, UK. KWolstencroft@cs.man.ac.uk|School of Computer Science, University of Manchester, UK. KWolstencroft@cs.man.ac.uk|School of Computer Science, University of Manchester, UK. KWolstencroft@cs.man.ac.uk|School of Computer Science, University of Manchester, UK. KWolstencroft@cs.man.ac.uk|School of Computer Science, University of Manchester, UK. KWolstencroft@cs.man.ac.uk