After finally getting to the stage where my thesis would compile on a different computer (see last post to install the extra .sty files), I then discover my page headers have disappeared on my pdf output. It turns out that this is due to the default ps2pdf setting being US letter paper, rather than the A4 size that the rest of my document is on. The answer (for the moment, anyway) is this:
ps2pdf -sPAPERSIZE=a4 thesis.ps
I'm forced to go a-latexin' followed by dvipsin' then ps2pdf because of some bounding box issues with my images with pdflatex that I can't be bothered to solve.
That will serve me right for having a typo in my thesis.