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Confidential information definition

What does Confidential information mean? In legal practice, confidential information is information not in the public domain that is protected because it was given in confidence or because disclosure is prohibited by statute or court order. It underpins duties in NDAs, employment and trade secrets protection, and is enforced through the common law of breach of confidence, typically by injunctions and damages. For local authorities in England and Wales, section 100A(3) of the Local Government Act 1972 defines confidential information for council meetings and papers as: information supplied by a government department on terms forbidding public disclosure; and information whose public disclosure is prohibited by...

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Employment confidential information and trade secrets: categorisation, implied and express protections, restraint of trade, privacy, defences and enforcement under UK law and the Trade Secrets Regulations 2018

Practice notes
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Practice Note: The duty of fidelity and Fiduciary duties

As explained in Practice Note: The duty of fidelity and fiduciary duties, an implied duty of fidelity in every Contract of employment will ordinarily prevent an employee from revealing to third parties confidential material learned in the course of their work. In addition, highly sensitive business information, commonly described as trade secrets, is protected by the equitable duty of confidence. Taken together, these obligations have historically shaped the implied responsibility owed by employees in relation to Confidential information.

The classification of business information is therefore pivotal: during employment, an employee is subject to an implied obligation not to disclose trade secrets and/or confidential information to others; after employment ends, only the implied restraint against revealing trade secrets persists. One exception is that a former employee may be stopped from benefiting, post-termination, from a breach of the implied duty that occurred whilst employed (see Practice Note: Springboard injunctions in employee competition claims).

Information that cannot be categorised as either a trade secret or confidential information is generally not capable of protection under these duties...

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Web page updated on 21/05/2026

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