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

Credit and counterparty credit risks and free deliveries: IRB approach to capital requirements (CR IRB 1): two values must match (OF08.01.01.01, Bank of England check boe_b0751_1)

A warning on the credit and counterparty credit risks and free deliveries: IRB approach to capital requirements (CR IRB 1) template (OF08.01.01.01), 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

Consistent values must be reported for RWEA on column 0251 and 0260 for Exposures from free deliveries applying risk weights under the alternative treatment or 100% weight (r0170) on sheet 0001 and sheet 0002

In row "Exposures from free deliveries applying risk weights under the alternative treatment or 100% and other exposures subject to risk weights" (0170) of Credit and counterparty credit risks and free deliveries: IRB approach to capital requirements (CR IRB 1) (OF08.01.01.01): "Risk-weighted exposure amount" (column 0260) must equal "Risk-weighted exposure amount pre-adjustments" (column 0251).

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. 02The two values must be the same. Find which of the two is right, and correct the other one.
  3. 03The Bank of England allows a small rounding difference, worked out from the decimals each value is reported with.
  4. 04It runs only when your filing indicators mark OF08.01.01 as reported.
  5. 05This 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

Credit and counterparty credit risks and free deliveries: IRB approach to capital requirements (CR IRB 1) (OF08.01.01.01)

Row

  • R0170Exposures from free deliveries applying risk weights under the alternative treatment or 100% and other exposures subject to risk weights

Columns

  • C0251Risk-weighted exposure amount pre-adjustments
  • C0260Risk-weighted exposure amount

Sheets

  • S0001Total (AIRB approach)
  • S0002Total (FIRB approach and slotting approach)

A worked example

With simple numbers.

Illustrative values
Risk-weighted exposure amount pre-adjustments1,200
What the rule then expects

Risk-weighted exposure amount must then be 1,200.

1,200Passes
1,300Fails

A file that reports 1,200 passes. One that reports 1,300 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 first paragraph of the plain words above is the Bank of England’s own, word for word, from its list of validations. The second spells out its formula, with each cell named from its templates.

Show the formulaShow

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

{t: OF08.01.01.01, r: 0170, c: 0260} = {t: OF08.01.01.01, r: 0170, c: 0251}

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

scope({t: OF08.01.01.01, z:0001;0002, f: banking, fv: banking_reporting})

Every PRA banking rule on OF08.01.01.01

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.