Customise Webform Email Submission Data
I managed to find the answer from an identical question at How to use [submission:values] in Email template in Webforms.

Using the webform-submissions.tpl.php template I changed the output structure from:

&lt;div&gt;&lt;label&gt;Name&lt;/label&gt;Name value&lt;/div&gt;


to:

&lt;div&gt;&lt;p class="label"&gt;Name&lt;/p&gt;&lt;p class="value"&gt;Name Value&lt;/p&gt;&lt;/div&gt;


Using the code below:

&lt;?php 
if ($format == 'html') {
    $output = drupal_render_children($renderable);
    $output = preg_replace('/&lt;label.*?&gt;/', '&lt;p class="label"&gt;', $output);
    $output = str_replace(' &lt;/label&gt;', ':&lt;/p&gt;&lt;p class="value"&gt;', $output);
    $output = str_replace('&lt;/div&gt;', '&lt;/p&gt;&lt;/div&gt;', $output);
    print $output;
}
?&gt;


Now the styling in my Outlook emails look much better :)