Changes

<li><span style="font-family: monospace">1976&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;56&nbsp;hrs&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; - John Frederik Hornsey (1974)</span>

<li><span style="font-family: monospace">1977-78&nbsp;&nbsp;&nbsp;54&nbsp;hrs&nbsp;40&nbsp;min - Peter W. Ford (1976)</span>

<li><span style="font-family: monospace">1984-85&nbsp;&nbsp;&nbsp;42&nbsp;hrs&nbsp;15&nbsp;min - Charlotte Allard and Fay Gillanders (1982)</span>

<li><span style="font-family: monospace">1986-91&nbsp;&nbsp;&nbsp;41&nbsp;hrs&nbsp;42&nbsp;min - Anthony D. Sproson (1984)</span>