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

Header Info: the Firm Reference Number (FRN) shall follow a valid format (SC700.00.01.01, Bank of England check boe_b0955_ss)

A blocking check on the header Info template (SC700.00.01.01), in the own funds for SDDTs (PRA116) return.

Line4 Check runs it on the own funds for SDDTs (PRA116) return, proven on test files, check by check: the same outcome on all three test files of that return.

The rule in plain words

The Firm Reference Number (FRN) shall follow a valid format

In Header Info (SC700.00.01.01): "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 table 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 SC700.00.01 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 (SC700.00.01.01)

Row

  • R0020Firm reference number (FRN)

Column

  • C0010Header info

Which returns it applies to

Line4 Check runs it on the own funds for SDDTs (PRA116) return on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to own funds for SDDTs (PRA116) 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: SC700.00.01.01, r: 0020, c: 0010}, "^[0-9]{6,8}$")

Every PRA banking rule on SC700.00.01.01

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.