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ARTICLE · 02 NOVEMBER 2026

AI In Planning Casework: Does The Updated Guidance Go Far Enough?

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The Planning Inspectorate has updated its guidance on artificial intelligence use in planning casework, introducing new requirements for disclosure and accountability. This analysis examines how the September 2026 guidance has evolved from previous versions, explores its implications for the National Infrastructure regime, and compares it with the approach taken by Planning and Environment Decision Wales.

United KingdomReal Estate and Construction

The Planning Inspectorate (PINS) updated its guidance on the "Use of artificial intelligence in casework evidence" on 23 September 2026. In our blog below, Doug Haycock considers how the guidance has evolved, the details of the recent update, the implications for the NSIP regime and a comparison with the published position from Planning and Environment Decision Wales (PEDW).

How the guidance has evolved

The original September 2024 guidance asked parties to disclose the AI tools used, the sources the AI relied on, what it created or altered and the date of use. It also required AI-generated content to be clearly labelled in the body of the document. In February 2026, the guidance was updated to introduce a "golden rule" of responsible use, making each party responsible for the accuracy of AI-generated material. In-body labelling was replaced by a short statement from professional and interested parties. 

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