I'd take out .moppy/. That must be hard-coded in there somewhere, since the document_root variable wouldn't show it.
If you click a date, you get a 404--but the gurunanakdarbar.org.uk/calender/calendar_handle.php file is there, so that makes me think .moppy/ might be throwing it off.
That should be left out anyway, since it could change and mess things up later.
$SERVER['DOCUMENTROOT'] should just be /home/harvey115/gurunanakdarbar.org.uk
I also notice that when you click a date, you end up at a URL like this:
So it looks like "/home/.moppy/harvey115/gurunanakdarbar.org.uk" is also added somewhere that it doesn't need to be.
Also, to avoid possible confusion later, keep in mind that you're spelling it calender and they spell it calendar.
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