1 min readWarningBank of England banking taxonomy 4.1.1Updated 11 November 2026

Breakdown of relevant credit exposures of SDDTs by country: a value must not be negative (SC09.04.01.01, Bank of England check boe_b0084_ss)

A warning on the breakdown of relevant credit exposures of SDDTs by country template (SC09.04.01.01), in the own funds for SDDTs (PRA116) return.

Line4 Check runs it on the own funds for SDDTs (PRA116) return, proven on test files, check by check: the same outcome on all three test files of that return.

The rule in plain words

In Breakdown of relevant credit exposures of SDDTs by country (SC09.04.01.01): every value in "Exposure value under the Standardised Approach" (row 0010) and "Exposure value of securitisation positions in the banking book" (row 0055) in column "Amount" (column 0010) must be zero or more.

The headline gives only the template and the kind of check, because the rule is too long to say in a headline. The plain words above say all of it.

What to do if your return fails it

  1. 01Open the table below and find the cells the rule reads.
  2. 02Look for a value below zero in these cells, such as an amount entered as a negative number.
  3. 03It runs only when your filing indicators mark SC09.04.01 as reported.
  4. 04This is a warning. It does not stop the return on its own, but your supervisor may ask you to explain it.

The cells it reads

Breakdown of relevant credit exposures of SDDTs by country (SC09.04.01.01)

Rows

  • R0010Exposure value under the Standardised Approach
  • R0055Exposure value of securitisation positions in the banking book

Column

  • C0010Amount

Which returns it applies to

Line4 Check runs it on the own funds for SDDTs (PRA116) return on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to own funds for SDDTs (PRA116) returns, as a warning.

The Bank’s own words and formula

The plain words above spell out the Bank’s formula, with each cell named from its templates. In the Bank of England’s list of validations, word for word:

v4745_s: [SC09.04.01.01 (r0010;0020;0030;0040;0055;0070;0080;0090;0100, c0010, All sheets)] >= 0
Show the formulaShow

The Bank of England's formula. Cells are written as {t: table, r: row, c: column}.

{t: SC09.04.01.01, r: 0010; 0055, c: 0010} >= 0

Checks like this one, run at the point of submission, are the first step to real-time supervision. Line4 builds SupTech software for financial regulators that runs checks like these as each return arrives.