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

"Risk weighted exposure amount at the end of the current reporting period" must equal the sum of 8 cells (C34.11.01.01, Bank of England check v09851_m)

A warning on the counterparty credit risk: rwea flow statements of CCR exposures under the IMM (CCR 11) template (C34.11.01.01), in the own funds (PRA001) return.

Line4 Check runs it on the own funds (PRA001) return, proven on test files, check by check: the same outcome on all three test files of that return.

Check your file for this ruleWhat to do if it fails

The rule in plain words

In each of "Quarterly flows" (column 0010) and "Annual flows" (column 0020) of Counterparty credit risk: rwea flow statements of CCR exposures under the IMM (CCR 11) (C34.11.01.01): "Risk weighted exposure amount at the end of the current reporting period" (row 0090) must equal the sum of 8 cells (listed below).

What to do if your return fails it

  1. 01Open the table below and find the cells the rule reads.
  2. 02Add up the parts in your return and compare the result with the total.
  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.
  4. 04The Bank of England allows a small rounding difference, worked out from the decimals each value is reported with.
  5. 05It runs only when your filing indicators mark C34.11.01 as reported.
  6. 06This 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

Counterparty credit risk: rwea flow statements of CCR exposures under the IMM (CCR 11) (C34.11.01.01)

Rows

  • R0010Risk weighted exposure amount at the end of the previous reporting period
  • R0020Asset size
  • R0030Credit quality of counterparties
  • R0040Model updates (IMM only)
  • R0050Methodology and policy (IMM only)
  • R0060Acquisitions and disposals
  • R0070Foreign exchange movements
  • R0080Other
  • R0090Risk weighted exposure amount at the end of the current reporting period

Columns

  • C0010Quarterly flows
  • C0020Annual flows

A worked example

With simple numbers.

Illustrative values
Risk weighted exposure amount at the end of the previous reporting period1,200
Asset size800
Credit quality of counterparties450
Model updates (IMM only)300
Methodology and policy (IMM only)150
Acquisitions and disposals100
Foreign exchange movements60
Other40
Together3,100
What the rule then expects

Risk weighted exposure amount at the end of the current reporting period must then be 3,100.

3,100Passes
3,200Fails

A file that reports 3,100 passes. One that reports 3,200 fails, by 100.

The numbers are illustrative, reported to the unit, so the rounding tolerance does not change the result.

Which returns it applies to

Line4 Check runs it on the own funds (PRA001) return on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to own funds (PRA001) 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:

v09851_m: [C34.11.01.01 (All columns)] {r0090} = {r0010} + {r0020} + {r0030} + {r0040} + {r0050} + {r0060} + {r0070} + {r0080}
Show the formulaShow

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

{t: C34.11.01.01, r: 0090} = {t: C34.11.01.01, r: 0010} + {t: C34.11.01.01, r: 0020} + {t: C34.11.01.01, r: 0030} + {t: C34.11.01.01, r: 0040} + {t: C34.11.01.01, r: 0050} + {t: C34.11.01.01, r: 0060} + {t: C34.11.01.01, r: 0070} + {t: C34.11.01.01, r: 0080}

Where it applies, in the Bank's words (its scope):

scope({t: C34.11.01.01, c:0010;0020, f: banking, fv: banking_reporting})

Every PRA banking rule on C34.11.01.01

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.