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1 min readBlockingBank of England taxonomy 2.2.0Updated 11 November 2026

Reinsurer/collateral identifier in IR.30.05 (C0010) must be also present in either IR.30.04 (C0050 or C0140) OR IR.31.01 (C0040) (IR.30.04, IR.30.05, IR.31.01, Bank of England rule IR_bv2643)

A blocking check on the non-life outwards reinsurance contract reinsurer exposures (IR.30.04), reinsurer and collateral provider entity information (IR.30.05) and outwards reinsurance balance sheet exposures (IR.31.01) templates, in the annual solo (ARS) and annual third-country branch (ARB) returns.

Check your file for this ruleWhat to do if it fails

The rule in plain words

Reinsurer/collateral identifier in IR.30.05 (C0010) must be also present in either IR.30.04 (C0050 or C0140) OR IR.31.01 (C0040)

What to do if your return fails it

  1. 01Open the tables below and find the cells the rule reads.
  2. 02The check applies only when its first part holds in your return. When it does, the second part must hold too: fix the second part, or correct the first.
  3. 03It runs only when your filing indicators mark IR.30.04, IR.30.05 and IR.31.01 as reported.
  4. 04This is a blocking check. A return that fails it is normally rejected, so fix it before you submit.

The cells it reads

Non-life outwards reinsurance contract reinsurer exposures (IR.30.04.01.01)

Column

  • C0120Type of collateral (if applicable)

Reinsurer and collateral provider entity information (IR.30.05.01.01)

Column

  • C0040Type of reinsurer or collateral provider

Outwards reinsurance balance sheet exposures (IR.31.01.01.01)

Column

  • C0200The reinsurer’s share of premiums written

Which returns it applies to

Line4 Check runs it on annual solo (ARS) and annual third-country branch (ARB) returns on Bank of England taxonomy 2.2.0. The Bank of England applies it to annual third-country branch (ARB) and 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}.

If not(isnull({t: IR.30.05.01.01, c: C0040})) then not(isnull({t: IR.30.04.01.01, c: C0120, z: Z0001})) or not(isnull({t: IR.31.01.01.01, c: C0200, z: Z0001})) or not(isnull({t: IR.30.04.01.01, c: C0120, z: Z0001})) else true()

Every Solvency UK rule on IR.30.04

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.