\begin{center}{\Large\bf Declaration of Authorship \par}\end{center}
I declare that this thesis and the work presented in it is my own and has
been generated by me as the result of my own original research.
I confirm that:
\begin{enumerate}
\item This work was done wholly or mainly while in candidature for a degree at this University;
\item Where any part of this thesis has previously been submitted for any other qualification at this University or any other institution, this has been clearly stated;
\item Where I have consulted the published work of others, this is always clearly attributed;
\item Where I have quoted from the work of others, the source is always given. With the exception of such quotations, this thesis is entirely my own work;
\item I have acknowledged all main sources of help;
\item Where the thesis is based on work done by myself jointly with others, I have made clear exactly what was done by others and what I have contributed myself;
\ifthenelse{\isempty{#1}}
{\item None of this work has been published before submission}
{\item Parts of this work have been published as: #1}