notifications-admin/app/templates/components/uk_components/back-link/template.njk

<a href="{%- if params.href %}{{ params.href }}{% else %}#{% endif -%}" class="govuk-back-link{%- if params.classes %} {{ params.classes }}{% endif -%}"
  {%- for attribute, value in params.attributes %} {{attribute}}="{{value}}"{% endfor %}>{{ (params.html | safe if params.html else (params.text if params.text else 'Back')) }}</a>