Hello STEVE DAVEY,

Sorry for late reply to this,
You can modify this file JoomlaFolder\components\com_easyblog\themes\default\toolbar.php

//LINE 78

		<h2 class="component-title reset-h"><?php echo JText::_( $title ); ?></h2>

//Replace with

		<h1 class="component-title reset-h"><?php echo JText::_( $title ); ?></h1>

*Note : You can follow this template overriding documentation for prevent future update every time you no need to modify again
-> http://stackideas.com/docs/easyblog/customizations/template-overriding