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

(LR6) Treatment of collateral swaps: a total must equal the sum of its parts (LV49.00.00.01, Bank of England check boe_b0042)

A blocking check on the (LR6) Treatment of collateral swaps template (LV49.00.00.01), in the contingent leverage (LVR002) return.

Line4 Check runs it on the contingent leverage (LVR002) return, proven on test files, check by check: the same outcome on all eight test files of that return.

Check your file for this ruleWhat to do if it fails

The rule in plain words

'Market value of collateral borrowed (period end) - of which: Totals for transactions in which non-liquid assets are lent and the following collateral is borrowed' must be equal to the sum of particular assets

In column "Market value of collateral borrowed (period end)" (0020) of (LR6) Treatment of collateral swaps (LV49.00.00.01): "of which: Totals for transactions in which non-liquid assets are lent and the following collateral is borrowed" (row 0200) must equal the sum of "Level 1 assets" (row 0210), "Level 2A assets" (row 0220), "Level 2B assets" (row 0230) and "Non-liquid assets" (row 0240).

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.

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  3. 03If they differ, a part is missing, a value sits in the wrong cell, or the total is out of date.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 LV49.00.00 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

(LR6) Treatment of collateral swaps (LV49.00.00.01)

Rows

  • R0200of which: Totals for transactions in which non-liquid assets are lent and the following collateral is borrowed
  • R0210Level 1 assets
  • R0220Level 2A assets
  • R0230Level 2B assets
  • R0240Non-liquid assets

Column

  • C0020Market value of collateral borrowed (period end)

Which returns it applies to

Line4 Check runs it on the contingent leverage (LVR002) return on Bank of England banking taxonomy 4.1.1. The Bank of England applies it to contingent leverage (LVR002) 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}.

{t: LV49.00.00.01, r: 0200, c: 0020} = sum({t: LV49.00.00.01, r: 0210; 0220; 0230; 0240, c: 0020})

Every PRA banking rule on LV49.00.00.01

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.