{% load wagtailcore_tags wagtailimages_tags %}
<div class="image-linked-block">
    {% if self.link %}
        <a href="{{ self.link }}" {% if self.link_newtab %}target="_blank" rel="noopener noreferrer"{% endif %}>
            {% image self.image original %}
        </a>
    {% else %}
        {% image self.image original %}
    {% endif %}
</div>