The British Library’s Electronic Thesis Online Service (EThOS) is currently offline due to a 2024 cyber attack, and as such the previous link we provided to Gordon Toplis Thesis no longer works.

We have therefore shared secure versions of the thesis below (the first embedded PDF is the thesis, the second is the appendices). This format may not be downloaded, though if you would like a softcopy for non commerical purposes, please contact us.