oliverdavies.uk/source/_includes/post/pager.html.twig

<div class="flex mt3">
    {% if page.previous_post %}
        <div class="w-50-ns">
           <a href="{{ page.previous_post.url }}" class="blue hover-blue">
                &laquo; {{ page.previous_post.title }}
            </a>
        </div>
    {% endif %}

    {% if page.next_post %}
        <div class="w-50-ns tr">
            <a href="{{ page.next_post.url }}" class="blue hover-blue">
                {{ page.next_post.title }} &raquo;
            </a>
        </div>
    {% endif %}
</div>