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

"Total core approach" must equal "Portfolios under articles 9 to 17 - total category level post-diversification" (C32.02.01.01, Bank of England check v6335_m)

A blocking check on the prudent valuation: core approach - Pre and post diversification (PRUVAL 2) template (C32.02.01.01), in the own funds (PRA001) return.

Line4 Check runs it on the own funds (PRA001) return, proven on test files, check by check: the same outcome on all three test files of that return.

Check your file for this ruleWhat to do if it fails

The rule in plain words

In each of 6 columns (listed below) of Prudent valuation: core approach - Pre and post diversification (PRUVAL 2) (C32.02.01.01): "Total core approach" (row 0010) must equal "Portfolios under articles 9 to 17 - total category level post-diversification" (row 0030).

What to do if your return fails it

  1. 01Open the table below and find the cells the rule reads.
  2. 02The two values must be the same. Find which of the two is right, and correct the other one.
  3. 03The Bank of England allows a small rounding difference, worked out from the decimals each value is reported with.
  4. 04It runs only when your filing indicators mark C32.02.01 as reported.
  5. 05This is a blocking check. A return that fails it is normally rejected, so fix it before you submit.

The cells it reads

Prudent valuation: core approach - Pre and post diversification (PRUVAL 2) (C32.02.01.01)

Rows

  • R0010Total core approach
  • R0030Portfolios under articles 9 to 17 - total category level post-diversification

Columns

  • C0010Market price uncertainty
  • C0020Of which: calculated using the expert based approach
  • C0030Close-out costs
  • C0040Of which: calculated using the expert based approach
  • C0050Model risk
  • C0060Of which: calculated using the expert based approach

A worked example

With simple numbers.

Illustrative values
Portfolios under articles 9 to 17 - total category level post-diversification1,200
What the rule then expects

Total core approach must then be 1,200.

1,200Passes
1,300Fails

A file that reports 1,200 passes. One that reports 1,300 fails, by 100.

The numbers are illustrative, reported to the unit, so the rounding tolerance does not change the result.

Which returns it applies to

Line4 Check runs it on the own funds (PRA001) return on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to own funds (PRA001) returns, as a blocking check.

The Bank’s own words and formula

The plain words above spell out the Bank’s formula, with each cell named from its templates. In the Bank of England’s list of validations, word for word:

[v6335_m];[scope({t: C32.02.01.01, c:0010;0020;0030;0040;0050;0060})];[{t: C32.02.01.01, r: 0010} = {t: C32.02.01.01, r: 0030}]
Show the formulaShow

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

{t: C32.02.01.01, r: 0010} = {t: C32.02.01.01, r: 0030}

Where it applies, in the Bank's words (its scope):

scope({t: C32.02.01.01, c:0010;0020;0030;0040;0050;0060, f: banking, fv: banking_reporting})

Every PRA banking rule on C32.02.01.01

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.