Shop Category

Hi looking for some help as I'm going round in circles here! Shop App, Perch (not Runway) If I have 3 categories in a shop say "Butcher" "Baker" "Candlestick Maker" and I use a url "my_site.com/category.html?cat=products/butcher" and a template

<perch:shop id="cat" type="text">
<perch:before>
<ul class="listing">
</perch:before>
<li class="listed">
<div class="sort">
    <img class ="img-responsive"src="<perch:shop id="image" type="image" label="Main product image" order="4" width="800" />">

    <a href="product.html?product=<perch:shop id="slug" type="slug" />">
        <perch:shop id="title" type="text" />
    </a>
        £<perch:shop id="price" type="text"/>
    <perch:if not-exists="has_variants">
        <perch:form id="add_to_cart" app="perch_shop">
            <perch:input  env-autofill="false" id="product" type="hidden" value="<perch:shop id="productID" env-autofill="false" />" />
            <perch:input type="submit" class="btn btn-d btn-lg button-mg" value="Add to cart" />
        </perch:form>
    </perch:if>
</div>
</li>
<perch:after>
</ul>
</perch:after>

That lists all the products in the "Butcher" category; how therefore do I display, separately, the Title and Description of that category and only that category? I suspect I missed something obvious and have now massively overcomplicated the task.

Simon