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

Header Info: the FRN must follow a valid format (CP700.00.01.01, SC700.00.01.01, Bank of England check boe_b1073)

A blocking check on the header Info (CP700.00.01.01) and header Info (SC700.00.01.01) templates, in the capital+ actuals and forecasts (PRA112), capital+ forecast semi annual (PRA113), capital+ forecast annual (PRA114), capital+ forecast semi annual for SDDTs and SDDT consolidation entities (PRA117) and capital+ forecast annual for SDDTs and SDDT consolidation entities (PRA118) returns.

Line4 Check runs it on the capital+ actuals and forecasts (PRA112), capital+ forecast semi annual (PRA113), capital+ forecast annual (PRA114), capital+ forecast semi annual for SDDTs and SDDT consolidation entities (PRA117) and capital+ forecast annual for SDDTs and SDDT consolidation entities (PRA118) returns, proven on test files, check by check: the same outcome on all 39 test files of those returns.

The rule in plain words

The FRN must follow a valid format

In Header Info (CP700.00.01.01): "Firm reference number (FRN)" in column "Header info" (row 0020, column 0010) must be in the format 6 to 8 digits.

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 CP700.00.01 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

Header Info (CP700.00.01.01)

Row

  • R0020Firm reference number (FRN)

Column

  • C0010Header info

Header Info (SC700.00.01.01)

Row

  • R0020Firm reference number (FRN)

Column

  • C0010Header info

Which returns it applies to

Line4 Check runs it on the capital+ actuals and forecasts (PRA112), capital+ forecast semi annual (PRA113), capital+ forecast annual (PRA114), capital+ forecast semi annual for SDDTs and SDDT consolidation entities (PRA117) and capital+ forecast annual for SDDTs and SDDT consolidation entities (PRA118) returns on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to capital+ forecast semi annual for SDDTs and SDDT consolidation entities (PRA117), capital+ forecast annual for SDDTs and SDDT consolidation entities (PRA118), capital+ forecast annual (PRA114), capital+ forecast semi annual (PRA113) and capital+ actuals and forecasts (PRA112) 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}.

matches({t: CP700.00.01.01, r: 0020, c: 0010}, "^[0-9]{6,8}$")

Every PRA banking rule on CP700.00.01.01

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.