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

Operational risk: part 5 - historical losses (OPR): a conditional check (OF16.00.01.05, SC16.00.01.05, Bank of England check boe_b0806)

A warning on the operational risk: part 5 - historical losses (OPR) (OF16.00.01.05) and operational risk: part 5 - historical losses (OPR) (SC16.00.01.05) templates, in the own funds (PRA001) and own funds for SDDTs (PRA116) returns.

Line4 Check runs it on the own funds (PRA001) and own funds for SDDTs (PRA116) returns, proven on test files, check by check: the same outcome on all six test files of those returns.

The rule in plain words

The ten-year average Total amount of excluded operational risk losses takes into account the sum of the annual amounts over the previous years from T to T-9

In row "Total amount of excluded operational risk losses" (0030) of Operational risk: part 5 - historical losses (OPR) (OF16.00.01.05): if anything is reported in 10 columns (listed below), "Ten-year average" (column 0110) must equal the sum of 10 columns (listed below) divided by the number of values reported in 10 columns (listed below).

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 tables below and find the cells the rule reads.
  2. 02The check applies only when its first part holds in your return. When it does, the second part must hold too: fix the second part, or correct the first.
  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 OF16.00.01.05 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

Operational risk: part 5 - historical losses (OPR) (OF16.00.01.05)

Row

  • R0030Total amount of excluded operational risk losses

Columns

  • C0010T-9
  • C0020T-8
  • C0030T-7
  • C0040T-6
  • C0050T-5
  • C0060T-4
  • C0070T-3
  • C0080T-2
  • C0090T-1
  • C0100T
  • C0110Ten-year average

Operational risk: part 5 - historical losses (OPR) (SC16.00.01.05)

Row

  • R0030Total amount of excluded operational risk losses

Columns

  • C0010T-9
  • C0020T-8
  • C0030T-7
  • C0040T-6
  • C0050T-5
  • C0060T-4
  • C0070T-3
  • C0080T-2
  • C0090T-1
  • C0100T
  • C0110Ten-year average

Which returns it applies to

Line4 Check runs it on the own funds (PRA001) and own funds for SDDTs (PRA116) returns on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to own funds for SDDTs (PRA116) and 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}.

If count({t: OF16.00.01.05, r: 0030, c: 0010; 0020; 0030; 0040; 0050; 0060; 0070; 0080; 0090; 0100}) != 0 then {t: OF16.00.01.05, r: 0030, c: 0110} = sum({t: OF16.00.01.05, r: 0030, c: 0010; 0020; 0030; 0040; 0050; 0060; 0070; 0080; 0090; 0100}) / count({t: OF16.00.01.05, r: 0030, c: 0010; 0020; 0030; 0040; 0050; 0060; 0070; 0080; 0090; 0100}) else true()

Every PRA banking rule on OF16.00.01.05

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.