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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: breakdown by obligor grades or pools (CR IRB 2): a total must equal the sum of its parts (OF08.02.01.01, Bank of England check boe_b0761)

A blocking check on the credit and counterparty credit risks and free deliveries: IRB approach to capital requirements: breakdown by obligor grades or pools (CR IRB 2) template (OF08.02.01.01), in the own funds (PRA001) return.

Line4 Check does not run it on the own funds (PRA001) return. Held back after a different result on a test file. It gave a different result on at least one of Line4’s test files: a different outcome, or a different number of times tested. It is held back while we settle which is right, and stays out until it is proven.

Check your PRA001 returnWhat to do if it fails

Line4 Check does not run this check yet, so the button checks your return against the Bank's other checks for it. The validation run when you submit includes this one.

The rule in plain words

Total outflows due to CRM with substitution effect on the exposure should equal the sum of outflows due to unfunded credit protection and other funded credit protection

In Credit and counterparty credit risks and free deliveries: IRB approach to capital requirements: breakdown by obligor grades or pools (CR IRB 2) (OF08.02.01.01): "(-) Total outflows" (column 0070) must equal the sum of "(-) Guarantees" (column 0040), "(-) Credit derivatives" (column 0050) and "(-) Other funded credit protection" (column 0060).

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. 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  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.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. 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: breakdown by obligor grades or pools (CR IRB 2) (OF08.02.01.01)

Columns

  • C0040(-) Guarantees
  • C0050(-) Credit derivatives
  • C0060(-) Other funded credit protection
  • C0070(-) Total outflows

Sheets

  • S0001Total (AIRB approach)
  • S0002Total (FIRB approach and slotting approach)
  • S0006Institutions (FIRB approach)
  • S0009Corporates - Specialised Lending (AIRB approach)
  • S0010Corporates - Specialised Lending (FIRB approach or slotting 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

It is an active check of the Bank's for the own funds (PRA001) return on Bank of England banking taxonomy 4.1.1. Line4 Check does not run it yet, for the reason above. 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}.

{t: OF08.02.01.01, c: 0070} = sum({t: OF08.02.01.01, c: 0040; 0050; 0060})

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

scope({t: OF08.02.01.01, z:0001;0002;0006;0009;0010;0011;0012;0015;0016;0017;0018;0019;0020;0021;0022;0023;0024, f: banking, fv: banking_reporting})

Every PRA banking rule on OF08.02.01.01

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.