1 min readWarningBank of England taxonomy 2.2.0Updated 11 November 2026

Open derivatives: a check on its values (IR.08.01, Bank of England rule IR_bv1630)

A warning on the open derivatives template (IR.08.01), in the quarterly solo (QRS) and annual solo (ARS) returns.

The rule in plain words

If the item "valuation method" in Open Derivatives (IR.08.01) is equal to the "Quoted market price in active markets for the same assets or liabilities" then the CIC should not be equal to 'XT##' or 'XL##'

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 warning. It does not stop the return on its own, but your supervisor may ask you to explain it. It runs only when your filing indicators mark IR.08.01 as reported.

The cells it reads

Open derivatives - information on positions held (IR.08.01.01.01)

Column

  • C0250Valuation method

Open derivatives - information on derivatives (IR.08.01.01.02)

Column

  • C0380CIC

Which returns it applies to

Line4 Check runs it on quarterly solo (QRS) and annual solo (ARS) returns on Bank of England taxonomy 2.2.0. The Bank of England applies it to quarterly solo (QRS) and annual solo (ARS) returns, as a warning.

The Bank’s own words and formula

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

If the item "valuation method" in IR.08.01 - Open Derivatives is equal to the "Quoted market price in active markets for the same assets or liabilities" then the CIC should not be equal to 'XT##' or 'XL##'.
Show the formulaShow

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

not(matches({t: IR.08.01.01.02, c: C0380, z: Z0001}, "^((XT)|(XL))..$"))

Every Solvency UK rule on IR.08.01

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.