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

Memorandum items for SDDTs (CA4 SDDT): a total must equal the sum of its parts (SC04.00.01.01, SC01.00.01.01, Bank of England check boe_b0019_ss)

A warning on the memorandum items for SDDTs (CA4 SDDT) (SC04.00.01.01) and own funds for SDDTs (CA1 SDDT) (SC01.00.01.01) templates, in the own funds for SDDTs (PRA116) return.

Line4 Check runs it on the own funds for SDDTs (PRA116) return, proven on test files, check by check: the same outcome on all three test files of that return.

Check your file for this ruleWhat to do if it fails

The rule in plain words

Total holdings of CET1 investments in financial sector entities should equal amounts for CET1 holdings deducted in SC01.00 , risk weighted at 250% or temporary waives

In Memorandum items for SDDTs (CA4 SDDT) (SC04.00.01.01): the sum of "Holdings of CET1 capital of financial sector entities where the institution does not have a significant investment, net of short positions" (row 0230) and "Holdings of CET1 capital of financial sector entities where the institution has a significant investment, net of short positions" (row 0440) in column "Amount" (column 0010) must equal "(-) CET1 instruments of financial sector entities where the institution does not have a significant investment" in column "Amount" (row 0480, column 0010) in Own funds for SDDTs (CA1 SDDT) (SC01.00.01.01) plus "(-) CET1 instruments of financial sector entities where the institution has a significant investment" in column "Amount" (row 0500, column 0010) in Own funds for SDDTs (CA1 SDDT) (SC01.00.01.01) plus "Risk weighted exposures of CET1 holdings in financial sector entities which are not deducted from the institution's CET1 capital" in column "Amount" (row 0650, column 0010) divided by 2.5 plus "Holdings on CET1 Capital Instruments of financial sector entities where the institution does not have a significant investment temporary waived" in column "Amount" (row 0680, column 0010) plus "Holdings on CET1 Capital Instruments of financial sector entities where the institution has a significant investment temporary waived" in column "Amount" (row 0690, column 0010).

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. 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. 04The Bank of England allows a small rounding difference, worked out from the decimals each value is reported with.
  5. 05It runs only when your filing indicators mark SC01.00.01 and SC04.00.01 as reported.
  6. 06This 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

Own funds for SDDTs (CA1 SDDT) (SC01.00.01.01)

Rows

  • R0480(-) CET1 instruments of financial sector entities where the institution does not have a significant investment
  • R0500(-) CET1 instruments of financial sector entities where the institution has a significant investment

Column

  • C0010Amount

Memorandum items for SDDTs (CA4 SDDT) (SC04.00.01.01)

Rows

  • R0230Holdings of CET1 capital of financial sector entities where the institution does not have a significant investment, net of short positions
  • R0440Holdings of CET1 capital of financial sector entities where the institution has a significant investment, net of short positions
  • R0650Risk weighted exposures of CET1 holdings in financial sector entities which are not deducted from the institution's CET1 capital
  • R0680Holdings on CET1 Capital Instruments of financial sector entities where the institution does not have a significant investment temporary waived
  • R0690Holdings on CET1 Capital Instruments of financial sector entities where the institution has a significant investment temporary waived

Column

  • C0010Amount

Which returns it applies to

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

sum({t: SC04.00.01.01, r: 0230; 0440, c: 0010}) = {t: SC01.00.01.01, r: 0480, c: 0010} + {t: SC01.00.01.01, r: 0500, c: 0010} + {t: SC04.00.01.01, r: 0650, c: 0010} / 2.5 + {t: SC04.00.01.01, r: 0680, c: 0010} + {t: SC04.00.01.01, r: 0690, c: 0010}

Every PRA banking rule on SC04.00.01.01

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.