the problem is that the links for those for menu items is set to to an internal anchor:
<li class="parent"><a href="#">news</a>
when you visit the page at:
www.sportingequals.org.uk/
the blank anchor:
<a href="#">
actually matches.
However if you visit:
index.php
the blank anchor will not match.
Either always use index.php to access the page, or give those menu items a page to link to.