Wind farm developer fails in High Court challenge against Welsh Ministers over Y Bryn scheme

The Planning Court has dismissed a statutory challenge brought by Y Bryn Wind Farm Limited against the Welsh Ministers' refusal of planning permission for an 18-turbine wind farm spanning Bryn and Penhydd forests between Port Talbot and Maesteg, rejecting all five grounds of review advanced by the developer.

Handing down judgement on 17 August 2026 in Y Bryn Wind Farm Limited v The Welsh Ministers, HHJ Jarman KC, sitting as a judge of the High Court, upheld a decision dated 21 November 2025 refusing an application made under section 62D of the Town and Country Planning Act 1990. The proposal, capable of generating up to 129.6 MW and supplying the equivalent of more than 85,700 homes, involved turbines reaching 250 metres to blade tip together with new access tracks and highway junctions. The decision followed a report by a planning inspector who found that, while the scheme would deliver significant renewable energy benefits, it would cause unacceptable harm to landscape character and visual amenity affecting the Gower National Landscape and several special landscape areas, including Margam Country Park and the Mynydd Margam historic landscape.

The developer, granted permission to proceed by Mould J, argued that the process had been procedurally unfair, that national policy had been misapplied, that the decision was inconsistent with an earlier appeal by the same inspector, and that both the landscape and heritage assessments were flawed.

The procedural fairness ground centred on a statement of common ground agreed between the developer and Cadw, the statutory heritage consultee, which recorded that Cadw no longer objected to the scheme. The developer argued the inspector had departed from that agreement by treating the overall impact on the registered historic landscape as significant rather than moderate. HHJ Jarman KC rejected this, finding the statement had never altered Cadw's original assessment that three specific character areas carried fairly severe, severe and moderate impacts respectively, leaving the Welsh Ministers to weigh the scheme's benefits against harm that Cadw had already identified as significant.

On policy interpretation, the developer contended the inspector should have factored in the scheme's benefits when assessing whether harm was unacceptable, rather than reaching a conclusion on harm before weighing benefits separately. The judge found this sequencing a proper application of Policy 18 of Future Wales, which permits nationally significant renewable schemes subject to an assessment of unacceptable impact, with benefits then weighed against any harm identified.

The inconsistency argument, based on the inspector's use of "considerable" and "significant" to describe weight given to climate benefits in a previous decision, was described by the judge as an overly legalistic reading of the reports that lacked the benevolence with which such documents should be construed.

On landscape impacts, the judge accepted the Welsh Ministers' submission that the inspector had properly focused on tranquillity as the special quality most affected by the scheme, and had clearly understood the distinction between pre-assessed and non-pre-assessed areas. A reference to local policy "SP4" was accepted as a typographical error for SP3, causing no substantive unfairness.

The heritage ground, alleging the inspector wrongly treated the registered historic landscape as subject to statutory protection, was also dismissed, with the judge finding any stray reference to the 1990 Act had not featured in the inspector's ultimate planning balance.

The parties have been directed to file an agreed draft order within 14 days, with written submissions on any outstanding matters to follow.