Royal Bank of Scotland plc v Bannerman Johnstone Maclay [2005] CSIH 39 is a Scottish decision that reshaped audit practice across the United Kingdom. The bank lent to a company on the strength of audited accounts and, when the company failed, sued the auditors. The court accepted that a duty of care could arise to the bank because the auditors knew the bank was relying on the accounts as a condition of continued lending, and the audit firm had not disclaimed responsibility to it.
Bannerman is often read alongside Caparo. Where Caparo found no proximity to an anonymous investor, Bannerman found proximity to a lender whose reliance the auditor knew about. The decisive factor was the auditor's actual knowledge of the specific reliance, coupled with the absence of any disclaimer excluding it.
The immediate practical response was the widespread adoption of a disclaimer - the so-called Bannerman paragraph - in audit reports, stating that the report is made solely to the company's members as a body and that the auditor does not accept responsibility to anyone else. The Institute of Chartered Accountants in England and Wales issued guidance supporting this practice.
A disclaimer is not a complete answer. Under the Unfair Contract Terms Act 1977 an exclusion of liability for negligence must satisfy the requirement of reasonableness. A blanket disclaimer that a court finds unreasonable in context may not hold. The strength of a disclaimer depends on how clearly it was communicated and whether the third party genuinely had no other protection.
Bannerman shows that an accountant's third-party exposure can be actively managed through the wording of reports, but never eliminated. A firm relying on disclaimers should still hold a PI limit that reflects the value of the transactions its work supports, because a disclaimer that fails leaves the full loss in play. Apex covers this scoping conversation on the accountants PI guide, and the disclaimer-versus-reasonableness tension is equally live for insurance brokers.
The effectiveness of a Bannerman-style disclaimer depends on more than boilerplate. A disclaimer is most effective when it is prominent rather than buried, specific about who may and may not rely on the report, and consistent with how the firm actually deals with third parties. If a firm circulates its accounts to a lender knowing the lender will rely on them, while a disclaimer in the report says no third party may rely, a court may find the firm's conduct at odds with its wording. The reasonableness test under the Unfair Contract Terms Act 1977 looks at the whole relationship, not just the printed words.
In some transactions a lender or purchaser will ask the accountant to accept a duty to them directly, sometimes through a reliance letter or a hold-harmless arrangement. Accepting such a request is a deliberate widening of exposure and should be a conscious decision, priced into fees and disclosed to the firm's PI insurer where the wording requires it. Apex encourages firms to treat reliance requests as underwriting-relevant events rather than routine administration.
Apex Insurance Brokers Limited is authorised and regulated by the Financial Conduct Authority. Firm reference number 724952. This entry is general information, not advice on any particular policy.