2 min readBlockingBank 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): a cell must be left empty (OF08.01.01.01, Bank of England check boe_b1039)

A blocking check 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.

The rule in plain words

columns {0101,0102,0103} are reportable only for exposures subject to the slotting approach and shouldn't be populated for non-slotting exposure classes

In Credit and counterparty credit risks and free deliveries: IRB approach to capital requirements (CR IRB 1) (OF08.01.01.01): 20 rows (listed below) in "Volatility adjustment to the exposure" (column 0101), "(-) Financial collateral: adjusted value (Cvam)" (column 0102) and "(-) Of which: volatility and maturity adjustments" (column 0103) on 15 sheets must be left empty.

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. 02Remove the value from this cell where the rule applies. A 0 is a value too, so leave the cell out of the return altogether.
  3. 03It runs only when your filing indicators mark OF08.01.01 as reported.
  4. 04This is a blocking check. A return that fails it is normally rejected, so fix it before you submit.

The cells it reads

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

Rows

  • R000140%
  • R0010Total exposures
  • R0017Of which: Exposures to revolving loan commitments
  • R0020On-balance sheet items subject to credit risk
  • R0030Off-balance sheet items subject to credit risk
  • R003110%
  • R003220%
  • R003350%
  • R0034100%
  • R0035Own estimate
  • R0040Securities Financing Transactions netting sets
  • R0050Derivatives & Long Settlement Transactions netting sets
  • R0060From Contractual Cross Product netting sets
  • R0070Exposures assigned to obligor grades or pools: Total
  • R0080Specialised lending slotting approach: Total
  • R0170Exposures from free deliveries applying risk weights under the alternative treatment or 100% and other exposures subject to risk weights
  • R0175Purchased receivables
  • R0180Dilution risk: total purchased receivables
  • R0190Corporates: where a credit risk assessment by a nominated ECAI is not available
  • R0200of which: investment grade

Columns

  • C0101Volatility adjustment to the exposure
  • C0102(-) Financial collateral: adjusted value (Cvam)
  • C0103(-) Of which: volatility and maturity adjustments

Sheets

  • S0001Total (AIRB approach)
  • S0006Institutions (FIRB approach)
  • S0009Corporates - Specialised Lending (AIRB approach)
  • S0011Corporates - Other general corporates - non-SME (AIRB approach)
  • S0012Corporates - Other general corporates - non-SME (FIRB approach)
  • S0015Retail - Qualifying revolving (AIRB approach)
  • S0016Retail - Other SME (AIRB approach)
  • S0017Retail - Other non-SME (AIRB approach)
  • S0018Retail - Secured by commercial immovable property SME (AIRB approach)
  • S0019Retail - Secured by commercial immovable property non-SME (AIRB approach)
  • S0020Retail - Secured by residential immovable property - SME (AIRB approach)
  • S0021Retail - Secured by residential immovable property non-SME (AIRB approach)
  • S0022Corporates - Financial corporates and large corporates (FIRB approach)
  • S0023Corporates - Other general corporates - SME (AIRB approach)
  • S0024Corporates - Other general corporates - SME (FIRB approach)

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 blocking check.

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}.

isNull({t: OF08.01.01.01, r: 0001; 0010; 0017; 0020; 0030; 0031; 0032; 0033; 0034; 0035; 0040; 0050; 0060; 0070; 0080; 0170; 0175; 0180; 0190; 0200, c: 0101; 0102; 0103, z: 0001; 0006; 0009; 0011; 0012; 0015; 0016; 0017; 0018; 0019; 0020; 0021; 0022; 0023; 0024})

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.