Thesis by publication.   Papers which form chapters 4,5,6 and 7 are restricted by publisher's permissions.  Papers were removed, and pages inserted with title and link to full-text.  Paper which forms chapter 8 is a pre-print (has only been submitted), publisher of journal to which it has been submitted allows pre-print archiving so it was not removed.  8/8/12 The papers, and the complete thesis, have been placed in the dark upload of matching Eprints records Lyn 15/7/2020
Signatures on PDF removed and full-text attachment replaced. LM 07/04/20