"Gains or (-) losses on financial assets and liabilities designated at fair value through profit or loss, net" must equal the sum of 5 rows (SR16.05.04.01, Bank of England check boe_v1046_m)

The rule in plain words

What to do if your return fails it

1. 01Open the table below and find the cells the rule reads.
2. 02Add up the parts in your return and compare the result with the total.
3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.
4. 04The Bank of England allows a small rounding difference, worked out from the decimals each value is reported with.
5. 05It runs only when your filing indicators mark SR16.05.04 as reported.
6. 06This is a blocking check. A return that fails it is normally rejected, so fix it before you submit.

The cells it reads

Which returns it applies to

Line4 Check runs it on the intragroup financial reporting (core and detailed breakdowns) (RFB004) return on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to intragroup financial reporting (core and detailed breakdowns) (RFB004) 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:

boe_v1046_m: T1: SR16.05.04.01; columns: {SR16.05.04.01, c0010}; Expression: {SR16.05.04.01, r0070} = sum({SR16.05.04.01, r0020-0060}

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.