1 min readBlockingBank of England taxonomy 2.2.0Updated 11 November 2026

Society of Lloyd's own funds and capital requirements: a total must equal the sum of its parts (IR.23.05, Bank of England rule IR_bv0125)

A blocking check on the society of Lloyd's own funds and capital requirements template (IR.23.05), in the annual solo (ARS) return.

The rule in plain words

'Own Funds attributable to the Society eligible to meet Central Requirement': 'Total' reported in {IR.23.05.03, r0170, c0010} must equal: 'Tier 1 unrestricted' reported in c0020 plus 'Tier 1 restricted' reported in c0030 plus 'Tier 2' in reported in c0040 plus 'Tier 3' reported in c0050

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  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.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. 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 IR.23.05 as reported.
  6. 06This is a blocking check. A return that fails it is normally rejected, so fix it before you submit.

The cells it reads

Society of Lloyd's own funds and capital requirements: society of Lloyd's solvency capital requirement (IR.23.05.03.02)

Row

  • R0170Own Funds attributable to the Society eligible to meet Central Requirement

Columns

  • C0010Total
  • C0020Tier 1 unrestricted
  • C0030Tier 1
  • C0040Tier 2
  • C0050Tier 3

A worked example

With simple numbers.

Illustrative values
Tier 1 unrestricted1,200
Tier 1800
Tier 2450
Tier 3300
Together2,750
What the rule then expects

Total must then be 2,750.

2,750Passes
2,850Fails

A file that reports 2,750 passes. One that reports 2,850 fails, by 100.

The numbers are illustrative, reported to the unit, so the rounding tolerance does not change the result.

Which returns it applies to

Line4 Check runs it on annual solo (ARS) return on Bank of England taxonomy 2.2.0. The Bank of England applies it to annual solo (ARS) returns, as a blocking check.

The Bank’s own words and formula

The plain words above are the Bank of England’s own, word for word, from its list of validations.

Show the formulaShow

The Bank of England's formula. Cells are written as {t: table, r: row, c: column}.

{t: IR.23.05.03.02, r: R0170, c: C0010} = {t: IR.23.05.03.02, r: R0170, c: C0020} + {t: IR.23.05.03.02, r: R0170, c: C0030} + {t: IR.23.05.03.02, r: R0170, c: C0040} + {t: IR.23.05.03.02, r: R0170, c: C0050}

Every Solvency UK rule on IR.23.05

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.