This is not a vlid path for a require once statement:
<?php require_once(ngit.org.uk/public_html/applicationform.php/local/php55/share/pear/usr/local/php55/share/php); ?>
looks like you are trying to attach a file from the pear library, you should check with the host for the correct path.
your page is also missing the require_once line for the database connection:
<?php require_once('Connections/localhost.php'); ?>