app/views/claim_reviews/_error_header.html.slim
#error-summary.govuk-error-summary aria-labelledby="error-summary-title" role="alert" tabindex='-1' data-module="govuk-error-summary"
h2#error-summary-title.govuk-error-summary__title = summary
.govuk-error-summary__body
ul.govuk-list.govuk-error-summary__list
li = message