{{ govuk.linkBack(
    link = "#",
    text = "Back to the start of this transaction"
) }}
<%= govuk.link_back(
    link: "#",
    text: "Back to the start of this transaction"
) %> 
<a href="#" class="gv-c-link-back">Back to the start of this transaction</a>
{
  "link": "#",
  "text": "Back to the start of this transaction"
}