1 min readBlockingBank of England taxonomy 2.2.0Updated 11 November 2026

Solvency capital requirement - non-life and health catastrophe risk: values must agree (IRR.27.01, Bank of England rule IR_bv0705_01)

A blocking check on the solvency capital requirement - non-life and health catastrophe risk template (IRR.27.01), in the annual solo (ARS) return.

The rule in plain words

The item "Estimated Total Risk Mitigation/Total before diversification" reported in Solvency Capital Requirement - Non-life and Health catastrophe risk (IRR.27.01) should be equal to "Catastrophe Risk Charge Other non-life catastrophe risk before risk mitigation" minus "Catastrophe Risk Charge Other non-life catastrophe risk after risk mitigation"

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.

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 IRR.27.01 as reported.

The cells it reads

Solvency capital requirement - non-life and health catastrophe risk: man made catastrophe risk - liability (IRR.27.01.01.14)

Row

  • R2750Total

Columns

  • C0930Estimated Risk Mitigation
  • C0940Estimated Reinstatement Premiums

Solvency capital requirement - non-life and health catastrophe risk: man made catastrophe risk - liability (IRR.27.01.01.15)

Row

  • R2800Total before diversification

Column

  • C0970Estimated Total Risk Mitigation

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

In the Bank of England’s list of validations, word for word:

The item "Estimated Total Risk Mitigation/Total before diversification" reported in IRR.27.01 - Solvency Capital Requirement - Non-life and Health catastrophe risk should be equal to "Catastrophe Risk Charge Other non-life catastrophe risk before risk mitigation" minus "Catastrophe Risk Charge Other non-life catastrophe risk after risk mitigation".
Show the formulaShow

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

{t: IRR.27.01.01.15, r: R2800, c: C0970, z: Z0001} = {t: IRR.27.01.01.14, r: R2750, c: C0930, z: Z0001} - {t: IRR.27.01.01.14, r: R2750, c: C0940, z: Z0001}

Every Solvency UK rule on IRR.27.01

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.