1 min readBlockingBank of England taxonomy 2.2.0Updated 11 November 2026

Outwards reinsurance balance sheet exposures: a total must equal the sum of its parts (IR.31.01, Bank of England rule IR_bv1882)

A blocking check on the outwards reinsurance balance sheet exposures template (IR.31.01), in the annual group (ARG) return.

The rule in plain words

Total guarantees / collateral in place' on template S31.01.04 should equal sum of 'Asset arrangement as collateral to support the reinsurer exposure' plus 'Financial guarantees as collateral to support the reinsurer exposure' plus 'Cash deposits' on template S31.01.04 for each individual row

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  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.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.31.01 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

Outwards reinsurance balance sheet exposures (IR.31.01.04.01)

Columns

  • C0120Asset arrangements as collateral to support the reinsurer exposure
  • C0130Financial guarantees as collateral to support the reinsurer exposure
  • C0140Cash deposits
  • C0150Total guarantees / collateral in place

Which returns it applies to

Line4 Check runs it on annual group (ARG) return on Bank of England taxonomy 2.2.0. The Bank of England applies it to annual group (ARG) 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.31.01.04.01, c: C0150, z: Z0001} = {t: IR.31.01.04.01, c: C0120, z: Z0001} + {t: IR.31.01.04.01, c: C0130, z: Z0001} + {t: IR.31.01.04.01, c: C0140, z: Z0001}

Every Solvency UK rule on IR.31.01

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.