Okay bit of an update and a backwards step.
To solve the problem I used the code below to display the message when a user had not entered any items for the module to display to prevent a blank area.
<?php if(count($items) < 1): ?>
<div id="noitems">No press releases to display</div>
<?php endif; ?>[code type=php]
This has been working great, however, with the upgrade to version 2.6.8 (from 2.6.7) it does not work anymore even though this code was in a module template to stop it being overwritten.
Any ideas on why this is happening?