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fx_conversion

fx_conversion-2026200000

One entry is restated in EUR with the rate in the narrative.

expects fx_conversion

Statement files

2 highlighted lines differ from the same seed rendered without perturbations. That difference is the trap.

bnp_camt053.xml2 changed lines · first at line 225
<?xml version='1.0' encoding='utf-8'?>
<Document xmlns="urn:iso:std:iso:20022:tech:xsd:camt.053.001.02">
<BkToCstmrStmt>
<GrpHdr>
<MsgId>LB-acct-2026200000-2-2025-09-30</MsgId>
<CreDtTm>2025-09-30T23:59:00+00:00</CreDtTm>
</GrpHdr>
<Stmt>
<Id>acct-2026200000-2</Id>
<ElctrncSeqNb>1</ElctrncSeqNb>
<CreDtTm>2025-09-30T23:59:00+00:00</CreDtTm>
<FrToDt>
<FrDtTm>2025-09-01T00:00:00+00:00</FrDtTm>
<ToDtTm>2025-09-30T23:59:59+00:00</ToDtTm>
</FrToDt>
<Acct>
<Id>
<IBAN>GB84LBEN45276323440416</IBAN>
</Id>
<Ccy>GBP</Ccy>
</Acct>
<Bal>
<Tp>
<CdOrPrtry>
<Cd>OPBD</Cd>
</CdOrPrtry>
</Tp>
<Amt Ccy="GBP">66313.52</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Dt>
<Dt>2025-09-01</Dt>
</Dt>
</Bal>
<Ntry>
<Amt Ccy="GBP">4320.13</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-01</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-01</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t002</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO BRAMBLE LOGISTICS REF186739</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">2301.78</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-01</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-01</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t016</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>TFR OSPREY LEASING REF334817</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">474.91</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-02</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-02</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t015</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPO OSPREY LEASING REF587298</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">8732.67</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-03</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-03</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t021</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPO HARBOURLIGHT IT REF314823</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">12825.57</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-04</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-04</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t007</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPO FENWICK &amp; PARTNERS REF940203</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">7100.42</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-05</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-05</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t011</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP EASTFIELD ENERGY REF612019</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">7397.19</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-05</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-05</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t013</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>DD KESTREL INSURANCE REF297280</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">12938.94</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-08</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-08</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t005</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI AURORA CONSULTING LTD REF279919</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">13898.19</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-09</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-09</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t004</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP BRAMBLE LOGISTICS REF996658</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">13684.44</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-10</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-10</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t018</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI KESTREL INSURANCE REF351944</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="EUR">12218.90</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-11</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-11</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t022</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI LARKSPUR TRAVEL REF325821 | SETTLED IN EUR, CONVERT AT 0.8000 GBP/EUR</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">6262.36</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-12</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-12</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t020</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO BRAMBLE LOGISTICS REF749391</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">11509.14</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-16</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-16</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t010</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR BRAMBLE LOGISTICS REF261410</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">10700.13</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-16</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-16</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t017</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPO JUNIPER PAYROLL REF578956</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">4844.93</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-16</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-16</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t019</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO LARKSPUR TRAVEL REF150644</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">13986.68</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-19</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-19</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t006</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR BRAMBLE LOGISTICS REF413779</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">8474.50</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-19</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-19</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t014</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO KESTREL INSURANCE REF328513</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">14667.57</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-23</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-23</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t008</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPO EASTFIELD ENERGY REF727474</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">8956.50</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-25</Dt>
</BookgDt>
<ValDt>
<Dt>2025-09-25</Dt>
</ValDt>
<AcctSvcrRef>acct-2026200000-2-t009</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO LARKSPUR TRAVEL REF222296</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">6524.31</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-09-25</Dt>
hsbc_statement.xlsxUntouched by this perturbation
[sheet: Statement]
HSBC Bank plc
Business Current Account Statement
Account name: LEDGERBENCH DEMO LTD
Sort code / Account number: 26-23-71 50554725
Account reference: acct-2026200000-1
Statement period: 01 Sep 2025 to 30 Sep 2025
Currency: GBP
Opening balance: 190354.57
Date Payment type Details Paid out Paid in
01 Sep 2025 FPO AURORA CONSULTING LTD REF974378 1344.02
01 Sep 2025 TFR FENWICK & PARTNERS REF307871 8725.23
01 Sep 2025 DD GREENHOLM FOODS REF313821 1159.92
02 Sep 2025 CR CASTLEGATE PROPERTY REF426528 13227.96
02 Sep 2025 DD LARKSPUR TRAVEL REF767694 902.11
04 Sep 2025 FPO KESTREL INSURANCE REF886023 13245.04
07 Sep 2025 BP HARBOURLIGHT IT REF643532 7052.88
08 Sep 2025 FPI BRAMBLE LOGISTICS REF537260 10054.39
09 Sep 2025 CR MOORLAND TELECOM REF958136 14925.80
09 Sep 2025 TFR BRAMBLE LOGISTICS REF837804 4866.88
09 Sep 2025 DD GREENHOLM FOODS REF703188 13634.54
12 Sep 2025 DD KESTREL INSURANCE REF228812 4117.00
12 Sep 2025 SO OSPREY LEASING REF101329 14757.89
14 Sep 2025 DD HARBOURLIGHT IT REF161798 9054.63
14 Sep 2025 DD LARKSPUR TRAVEL REF694129 12014.89
15 Sep 2025 TFR OSPREY LEASING REF183184 102.98
18 Sep 2025 TFR LARKSPUR TRAVEL REF625851 13941.95
19 Sep 2025 FPO HARBOURLIGHT IT REF660088 1531.65
20 Sep 2025 DD KESTREL INSURANCE REF653242 2726.18
20 Sep 2025 TFR IRONBRIDGE TOOLING REF605523 10844.18
21 Sep 2025 SO GREENHOLM FOODS REF809039 6796.21
21 Sep 2025 FPI HARBOURLIGHT IT REF557435 11266.25
21 Sep 2025 FPO AURORA CONSULTING LTD REF612997 8812.91
22 Sep 2025 TFR LARKSPUR TRAVEL REF112906 10120.82
23 Sep 2025 FPO LARKSPUR TRAVEL REF415418 10700.12
24 Sep 2025 BP JUNIPER PAYROLL REF838720 14888.68
26 Sep 2025 FPI DELPHINIUM MEDIA REF435160 1239.71
26 Sep 2025 FPO CASTLEGATE PROPERTY REF668739 5624.21
29 Sep 2025 BP JUNIPER PAYROLL REF121380 11092.73
29 Sep 2025 BP DELPHINIUM MEDIA REF985390 812.52
30 Sep 2025 CR FENWICK & PARTNERS REF369568 13519.62
rbs_transactions.csvUntouched by this perturbation
"Date","Type","Description","Value","Account Name","Account Number","Ledger Ref"
"01/09/2025","BAL","OPENING BALANCE","209703.36","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"01/09/2025","BP","BP OSPREY LEASING REF655341","-787.29","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"01/09/2025","SO","SO NORTHGATE CLEANING REF529432","-4315.66","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"02/09/2025","FPO","FPO GREENHOLM FOODS REF620546","-2969.84","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"02/09/2025","DD","DD FENWICK & PARTNERS REF973302","-204.25","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"06/09/2025","DD","DD OSPREY LEASING REF129437","-14339.65","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"07/09/2025","SO","SO JUNIPER PAYROLL REF881318","-4870.04","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"08/09/2025","CR","CR KESTREL INSURANCE REF417414","5331.59","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"09/09/2025","SO","SO AURORA CONSULTING LTD REF621284","-4225.79","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"12/09/2025","TFR","TFR HARBOURLIGHT IT REF956966","3460.18","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"13/09/2025","BP","BP HARBOURLIGHT IT REF389143","-13380.68","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"13/09/2025","CR","CR FENWICK & PARTNERS REF735858","13288.91","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"15/09/2025","SO","SO EASTFIELD ENERGY REF903609","-5421.36","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"15/09/2025","SO","SO MOORLAND TELECOM REF319488","-14239.09","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"17/09/2025","CR","CR OSPREY LEASING REF631675","12449.99","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"17/09/2025","CR","CR OSPREY LEASING REF670854","7997.17","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"20/09/2025","BP","BP CASTLEGATE PROPERTY REF754770","-10623.03","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"23/09/2025","CR","CR FENWICK & PARTNERS REF109707","8245.08","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"24/09/2025","FPO","FPO DELPHINIUM MEDIA REF839985","-3707.84","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"24/09/2025","CR","CR JUNIPER PAYROLL REF914972","3765.27","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"26/09/2025","DD","DD AURORA CONSULTING LTD REF168443","-10901.66","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
"29/09/2025","CR","CR JUNIPER PAYROLL REF139892","5800.10","LEDGERBENCH DEMO LTD","53-86-53 94198352","acct-2026200000-3"
 

Ground truth

Public here because the benchmark is open; it is the model's prompt path that can never reach these values, not human readers.

AccountClosing balance
acct-2026200000-1£162,922.21
acct-2026200000-2£6,935.23
acct-2026200000-3£180,055.47

Recorded runs on this case

  • wrongSingle prompt2 steps · 10,772 tokens · Confidence low

    Model claude-sonnet-4-6Measured 2026-08-20Bench v1.0Run 11eaa71b2d02Commit 3d38c30

  • exactAgent with tools17 steps · 29,426 tokens · Confidence medium

    Model claude-sonnet-4-6Measured 2026-08-20Bench v1.0Run f140aa1e57f4Commit 384d72d

Step through any of these on the demo page.