Wrapper template for notifications?

Hey @cunnningstunts I assume you are talking about the email notification. So the best way to do it is by using this filter: https://github.com/BracketSpace/Notification/blob/develop/class/Defaults/Carrier/Email.php#L143

Like this:

add_filter( 'notification/carrier/email/message', function( $message ) {
	return '<your template html>' . $message . '</html>';
}, 10, 1 );