1 min readBlockingBank of England taxonomy 2.2.0Updated 11 November 2026

Solvency capital requirement - non-life and health catastrophe risk: values must agree (IR.27.01, Bank of England rule IR_bv0655)

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

The rule in plain words

The item "Diversification effect between regions" reported in Solvency Capital Requirement - Non-life and Health catastrophe risk (IR.27.01.01.02) should be equal to the difference between "Total Windstorm after diversification" and "Total Windstorm all Regions 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 and health catastrophe risk: non-life and health catastrophe risk - summary (IR.27.01.01.01)

Row

  • R0020Windstorm

Columns

  • C0010SCR before risk mitigation
  • C0030SCR after risk mitigation

Solvency capital requirement - non-life and health catastrophe risk: natural catastrophe risk - windstorm (IR.27.01.01.02)

Rows

  • R0800Total Windstorm all Regions before diversification
  • R0810Diversification effect between regions
  • R0820Total Windstorm after diversification

Columns

  • C0090Catastrophe Risk Charge before risk mitigation
  • C0120Catastrophe Risk Charge 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 effect between regions" reported in IR.27.01.01.02 - Solvency Capital Requirement - Non-life and Health catastrophe risk should be equal to the difference between "Total Windstorm after diversification" and "Total Windstorm all Regions before diversification".
Show the formulaShow

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

{t: IR.27.01.01.02, r: R0810, z: Z0001} = {t: IR.27.01.01.02, r: R0820, z: Z0001} - {t: IR.27.01.01.02, r: R0800, z: Z0001}

Every Solvency UK rule on IR.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.