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2 min readBlockingBank of England banking taxonomy 4.1.1Updated 11 November 2026

MREL Debt: values must agree (BR01.00.01.01, Bank of England check boe_b4102)

A blocking check on the MREL Debt template (BR01.00.01.01), in the MREL debt (MRL003) return.

Line4 Check runs it on the MREL debt (MRL003) return, proven on test files, check by check: the same outcome on all eight test files of that return.

Check your file for this rule

The rule in plain words

All the fields referenced in the expression are mandatory and should be populated. Where a data entry isn't relevant to the instrument reported, please enter Not Applicable

In MREL Debt (BR01.00.01.01): exactly 48 values must be reported in 48 columns (listed below).

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 BR01.00.01 as reported.

The cells it reads

MREL Debt (BR01.00.01.01)

Columns

  • C010Issuer Name
  • C020Identification of the issuer
  • C023Does the instrument qualify for MREL?
  • C026Jurisdiction in which the issuer is established
  • C030Governing Law
  • C040Contractual recognition of non-UK law governed instruments
  • C045Contractual/prospectus reference to the exercise of the Bank of England’s write-down and conversion powers
  • C050External or Internal issuance
  • C060For internal issuances only: Name of the entity which holds the intra-group instrument
  • C070For internal issuances only: Identification of the entity which holds the intra-group instrument
  • C080For internal issuances only: Amount of instrument held by the entity concerned
  • C090Stock exchange
  • C100Date of issuance
  • C110Maturity type
  • C120Legal final maturity date
  • C130Earliest redemption date
  • C140Accounting treatment of the instrument
  • C150Original currency
  • C160Original value, currency of issuance
  • C165Outstanding nominal value, currency of issuance
  • C170Outstanding nominal value, reporting currency
  • C180Accounting value
  • C190Coupon Type
  • C200Coupon rate
  • C210Coupon payment date
  • C220Coupon frequency
  • C230Type of instrument
  • C240Class of instrument
  • C250Regulatory value
  • C260Any non-standard terms included in the instrument
  • C270Name of Guarantor
  • C280Identification of the Guarantor
  • C290Conversion or write-down trigger for AT1 capital instruments - PRA rules
  • C295Contractual conversion or write-down trigger for internal MREL - MREL SoP
  • C300Other contractual conversion or write-down triggers or powers and the instrument type convertible into
  • C315Other contractual or statutory conversion or write-down powers of any non-UK authority
  • C325Eligibility legal opinions on MREL eligible liabilities instruments
  • C330Form of the security - Type
  • C333Form of the security - Name
  • C335Form of the security - Identification

And 8 more.

Which returns it applies to

Line4 Check runs it on the MREL debt (MRL003) return on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to MREL debt (MRL003) returns, as a blocking check.

The Bank’s own words and formula

The first paragraph of the plain words above is the Bank of England’s own, word for word, from its list of validations. The second spells out its formula, with each cell named from its templates.

Show the formulaShow

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

count({t: BR01.00.01.01, c: 010; 020; 023; 026; 030; 040; 045; 050; 060; 070; 080; 090; 100; 110; 120; 130; 140; 150; 160; 165; 170; 180; 190; 200; 210; 220; 230; 240; 250; 260; 270; 280; 290; 295; 300; 315; 325; 330; 333; 335; 410; 415; 420; 430; 440; 460; 470; 480})=48

Every PRA banking rule on BR01.00.01.01

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.