How does “Supporting papers” work on the Signed Accounts page?

Behind each year end's count is a drawer of nine supporting papers — the filing receipts from Companies House and HMRC, the approval minute, the representation letter, the auditor's report, the year-end trail of final trial balance, journals pack and iXBRL. They are kept beside the accounts rather than as columns, because a thirteen-column shelf is not one anybody reads. The drawer opens from the card and from the audit run, including for a year end that has nothing filed yet. Where: Signed Accounts (/accounts/signed-accounts).