1 min readBlockingBank of England taxonomy 2.2.0Updated 11 November 2026

Solvency capital requirement - non-life underwriting risk and solvency capital requirement - non-life and health catastrophe risk: values must agree (IR.26.05, IR.27.01, Bank of England rule IR_bv0652_01)

A blocking check on the solvency capital requirement - non-life underwriting risk (IR.26.05) and solvency capital requirement - non-life and health catastrophe risk (IR.27.01) templates, in the annual solo (ARS) return.

The rule in plain words

The item "Diversification between sub-modules" reported in Solvency Capital Requirement - Non-life and Health catastrophe risk (IR.27.01.01.01) should be equal to the difference between "Total Non-life catastrophe risk after diversification" and "Total Non-life catastrophe risk before diversification"

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 IR.27.01 as reported.

The cells it reads

Solvency capital requirement - non-life underwriting risk - non-life catastrophe risk and total non-life underwriting risk (IR.26.05.01.04)

Row

  • R0500Non-life catastrophe risk

Column

  • C0160Solvency capital requirement

Solvency capital requirement - non-life and health catastrophe risk: non-life and health catastrophe risk - summary (IR.27.01.01.01)

Rows

  • R0190Total Non-life catastrophe risk before diversification
  • R0200Diversification between sub-modules
  • R0210Total Non-life catastrophe risk after diversification

Columns

  • C0010SCR before risk mitigation
  • C0030SCR after 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 "Diversification between sub-modules" reported in IR.27.01.01.01 - Solvency Capital Requirement - Non-life and Health catastrophe risk should be equal to the difference between "Total Non-life catastrophe risk after diversification" and "Total Non-life catastrophe risk before diversification".
Show the formulaShow

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

{t: IR.27.01.01.01, r: R0200, z: Z0001} = {t: IR.27.01.01.01, r: R0210, z: Z0001} - {t: IR.27.01.01.01, r: R0190, z: Z0001}

Every Solvency UK rule on IR.26.05

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.