Categories in Shop Email response

Hi

Is it possible to use categories in a shop email response?

I have added in the tags for pulling through a category inside <perch:orderitems> but it is adding the category field to the email template fields in perch shop email in admin.

<perch:if exists="venue"><perch:categories id="venue" set="venue"><perch:category id="catTitle" type="text" /> <span><perch:category id="catLocation" type="text" /></span></perch:categories></perch:if>

Thanks

Neil