F W Gabbitas v Secretary of State for the Environment and Newham London Borough Council [1985] JPL 630
Gabbitas is one of the most frequently cited authorities on evidence in lawful-use and enforcement cases. It is particularly important where an applicant relies heavily on their own witness evidence and there is little or no independent documentary corroboration.
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- Neutral citation
- [1985] JPL 630; [1985] 1 WLUK 194; [1984] Lexis Citation 581
- Court
- High Court, Queen's Bench Division
- Judgment date
- 4th July 1984
- Judge
- Dobry J
Uncorroborated evidence is not automatically inadequate
The applicant bears the burden of proving the relevant planning facts on the balance of probabilities. Gabbitas makes clear, however, that the applicant’s own evidence does not have to be independently corroborated simply because it comes from an interested party.
Where the authority has no evidence of its own, and none from others, which contradicts the applicant or makes the account less than probable, there is no proper basis for rejecting sufficiently precise and unambiguous evidence merely because it lacks an independent witness or document.
Reasons are needed if unchallenged evidence is rejected
The Inspector’s decision was quashed because he had rejected unchallenged evidence without adequately explaining why and had effectively required independent corroboration as an additional evidential hurdle.
That does not mean an authority must accept every statement at face value. Credibility, precision, ambiguity, inconsistency and contrary evidence remain relevant. The point is that corroboration is not a legal prerequisite.
Why Gabbitas still matters
The principle is now reflected in national guidance for certificates of lawfulness and is routinely applied in enforcement appeals. Later High Court authority, including O’Flynn v Secretary of State [2016] EWHC 2894 (Admin), continues to rely expressly on Gabbitas.
Judgment source
Planning Geek now holds the full judgment transcript locally. Gold Members can open it below.
The ratio is also restated inO’Flynn v Secretary of State for Communities and Local Government [2016] EWHC 2894 (Admin), which records why the original Inspector’s decision in Gabbitas was quashed.
Gabbitas Case Law Page Updated: 26th September 2026