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

To ensure the of which: volatility and maturity adjustments is negative or zero (OF08.01.01.01, Bank of England check boe_b1038)

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

to ensure the of which: volatility and maturity adjustments is negative or zero

In Credit and counterparty credit risks and free deliveries: IRB approach to capital requirements (CR IRB 1) (OF08.01.01.01): every value in the cells it covers must be zero or less.

What to do if your return fails it

  1. 01Open the table below and find the cells the rule reads.
  2. 02Compare the values in your return. If the first is bigger than it may be, one of them is wrong: check both before you change either.
  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
  • 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

Column

  • C0103(-) Of which: volatility and maturity adjustments

Sheets

  • S0002Total (FIRB approach and slotting approach)
  • S0010Corporates - Specialised Lending (FIRB approach or slotting 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}.

{t: OF08.01.01.01} <= 0

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

scope({t: OF08.01.01.01, r:0001;0010;0017;0020;0030;0031;0032;0033;0034;0035;0070;0080;0170,c:0103,z:0002;0010, 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.