I am not sure the <br /> would do it, perhaps you'd be better off wrapping the fields in a div.
See >>> <div id="fz-contact">
You should put the closing </div> before the closing </fieldset>
Then in your stylesheet add
#fz-contact {
clear: left;
}
Of course you can change the id name as you please.
<p>
<iframe src="https://www.google.com/maps/embed?pb=!1m14!1m8!1m3!1d2472.464934373071!2d-0.202045!3d51.706236!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x48763d383a952041%3A0x15 22595cf594661!2sTelecom+Spares+Ltd!5e0!3m2!1sen!2suk!4v1419328387005" width="270" height="280" frameborder="0" style="border:0"></iframe>
</p>
</div>
<p>
**<div id="fz-contact">**
<div class="alert forward"><?php echo FORM_REQUIRED_INFORMATION; ?></div>
<?php
// show dropdown if set
if (CONTACT_US_LIST !=''){
?>
<label class="inputLabel" for="send-to"><?php echo SEND_TO_TEXT; ?></label>
<?php echo zen_draw_pull_down_menu('send_to', $send_to_array, 0, 'id="send-to"') . '<span class="alert">' . ENTRY_REQUIRED_SYMBOL . '</span>'; ?>
<br class="clearBoth" />
<?php
}
?>