Line4

1 min readWarningBank of England taxonomy 2.2.0Updated 11 November 2026

The item "Contract size" in Open Derivatives should be reported for futures and options (CIC '##A#' or '##B#' or '##C#' or ‘##F2’) (IR.08.01, Bank of England rule IR_bv0753_02)

A warning on the open derivatives template (IR.08.01), in the quarterly group (QRG) and annual group (ARG) returns.

Check your file for this ruleWhat to do if it fails

The rule in plain words

The item "Contract size" in Open Derivatives (IR.08.01) should be reported for futures and options (CIC '##A#' or '##B#' or '##C#' or ‘##F2’)

What to do if your return fails it

  1. 01Open the tables below and find the cells the rule reads.
  2. 02Compare the code or text in your return with the format the rule sets out, character by character, including any prefix and any spaces.
  3. 03It runs only when your filing indicators mark IR.08.01 as reported.
  4. 04This is a warning. It does not stop the return on its own, but your supervisor may ask you to explain it.

The cells it reads

Open derivatives - information on positions held (IR.08.01.04.01)

Column

  • C0180Contract size

Open derivatives - information on derivatives (IR.08.01.04.02)

Column

  • C0380CIC

Which returns it applies to

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

The Bank’s own words and formula

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

The item "Contract size" in IR.08.01 - Open Derivatives should be reported for futures and options (CIC '##A#' or '##B#' or '##C#' or ‘##F2’).
Show the formulaShow

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

if matches({t: IR.08.01.04.02, c: C0380, z: Z0001}, "^..((A.)|(B.)|(C.)|(F2))$") then not(isNull({t: IR.08.01.04.01, c: C0180, z: Z0001})) else true()

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.