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

Total Specialised Lending Expected Loss Amount (Slotting approach) across all the types of specialised lending shall be consistent (OF08.06.01.01, OF08.01.01.01, Bank of England check boe_b0823)

A blocking check on the credit risk and free deliveries: IRB approach to capital requirements: specialised lending slotting approach (CR IRB 6) (OF08.06.01.01) and credit and counterparty credit risks and free deliveries: IRB approach to capital requirements (CR IRB 1) (OF08.01.01.01) templates, 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

Total Specialised Lending Expected Loss Amount (Slotting approach) across all the types of specialised lending shall be consistent

In Credit risk and free deliveries: IRB approach to capital requirements: specialised lending slotting approach (CR IRB 6) (OF08.06.01.01): "Total" in column "Expected loss amount" (row 0095, column 0090) must equal the sum of "Specialised lending slotting approach: Total" in column "Expected loss amount pre post- model adjustments" (row 0080, column 0280) on 2 sheets in Credit and counterparty credit risks and free deliveries: IRB approach to capital requirements (CR IRB 1) (OF08.01.01.01) divided by 2.

This is a blocking check. A return that fails it is normally rejected, so fix it before you submit. It runs only when your filing indicators mark OF08.01.01 and OF08.06.01 as reported.

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

  • R0080Specialised lending slotting approach: Total

Column

  • C0280Expected loss amount pre post- model adjustments

Sheets

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

Credit risk and free deliveries: IRB approach to capital requirements: specialised lending slotting approach (CR IRB 6) (OF08.06.01.01)

Row

  • R0095Total

Column

  • C0090Expected loss amount

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: OF08.06.01.01, r: 0095, c: 0090} = sum({t: OF08.01.01.01, r: 0080, c: 0280, z: 0002; 0010}) / 2

Every PRA banking rule on OF08.06.01.01

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.