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

PRA110. HQLA and usable liquidity. Initial Stock. Significant Currencies: every value in the cells it covers must be zero or more (CL66.02.01.06, Bank of England check boe_b2050_s)

A warning on the PRA110. HQLA and usable liquidity. Initial Stock. Significant Currencies template (CL66.02.01.06), in the liquidity pillar II (PRA110) return.

Line4 Check does not run it on the liquidity pillar II (PRA110) return. Not compiled, as no cell matches what they read. It reads a value that matches no cell of the return’s templates, so Line4 could not compile it.

Check your PRA110 returnWhat to do if it fails

Line4 Check does not run this check yet, so the button checks your return against the Bank's other checks for it. The validation run when you submit includes this one.

The rule in plain words

In PRA110. HQLA and usable liquidity. Initial Stock. Significant Currencies (CL66.02.01.06): every value in the cells it covers must be zero or more.

What to do if your return fails it

  1. 01Open the table below and find the cells the rule reads.
  2. 02Look for a value below zero in these cells, such as an amount entered as a negative number.
  3. 03This is a warning. It does not stop the return on its own, but your supervisor may ask you to explain it.

The cells it reads

PRA110. HQLA and usable liquidity. Initial Stock. Significant Currencies (CL66.02.01.06)

Rows

  • R7390Level 1 Tradable assets
  • R7400Level 2A Tradable Assets
  • R7410Level 2B Tradable Assets

Column

  • C010Initial stock

Which returns it applies to

It is an active check of the Bank's for the liquidity pillar II (PRA110) return on Bank of England banking taxonomy 4.1.1. Line4 Check does not run it yet, for the reason above. The Bank of England applies it to liquidity pillar II (PRA110) returns, as a warning.

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_b2050_s]; [CL66.02.01.06 ]; [scope({t:CL66.02.01.06,y:7390;7400;7410,x:010})]; [{t:CL66.02.01.06} >= 0]
Show the formulaShow

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

{t: CL66.02.01.06} >= 0

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

scope({t: CL66.02.01.06, r: 7390; 7400; 7410, c: 010, seq: False, f: banking, fv: liquidity_pillarii})

Every PRA banking rule on CL66.02.01.06

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.