41503document21111Decl_IS_Walker_Sarah_11_MPhil.pdfapplication/pdf579a953beffa4a0f3bf74e6cfc5039c5MD52733112012-07-05 08:17:45http://etheses.bham.ac.uk//id/eprint/3506/1/Decl_IS_Walker_Sarah_11_MPhil.pdf