An analysis of 4,200 decision notices issued across all 33 London boroughs between January 2022 and October 2024, examining which London Plan and Local Plan policies are most frequently cited as grounds for refusal — and how that pattern varies by borough, application type, and decision-maker.
Why decision notices matter
Decision notices are the most underused planning data resource in London. They contain the exact language LPAs use to justify a refusal — which policies were cited, how they were interpreted, and what the officer considered material. Aggregated across thousands of decisions, they reveal patterns that are invisible in any single case: which policies are used most aggressively, which boroughs are most divergent from GLA guidance, and where policy is being applied inconsistently.
“Policy D3 appears in 38% of all residential refusals — more than any other London Plan policy — yet its application varies dramatically. In Tower Hamlets, density concerns are cited alongside design quality. In outer London boroughs, the same policy is used to resist schemes that would be welcomed closer to the centre.”
— Stormglass Research, November 2024
The density paradox
Policy D3 (Optimising the potential of sites) is supposed to push density up, not down — it asks LPAs to ensure development makes the best use of land. Yet it appears most frequently in refusals of residential schemes, and disproportionately in outer London boroughs where the baseline density is lower. The policy is being used symmetrically: inner London boroughs cite it to refuse schemes they consider under-dense; outer London boroughs cite it for schemes they consider over-dense for the area.
Affordable housing: the compliance gap
Policy H4 (Delivering affordable housing) is the second most-cited refusal ground. What's notable is where it appears: 72% of H4 citations occur in boroughs where the borough's own Local Plan sets a lower affordable housing threshold than the London Plan's 50% benchmark. These boroughs are using H4 not to enforce the London Plan target but to justify refusal of schemes that comply with the borough target but fall short of the GLA's.
Boroughs with highest divergence from GLA policy interpretation
- →Tower Hamlets — most frequent D6 (tall buildings) citations; applies height thresholds well below GLA guidance
- →Westminster — highest H4 citation rate; consistently demands above-50% affordable despite viability assessments
- →Camden — highest SI 2 citation rate; applies net-zero standard more strictly than GLA minimum
- →Havering — most frequent T6 citations; resists car-free requirements in accessible zones
- →Barnet — highest Local Plan over London Plan citation ratio; relies on Local Plan more than GLA framework
Multi-ground refusals and appeal risk
67% of the decision notices analysed cite three or more policy grounds. This matters for appeal: PINS inspectors consistently find multi-ground refusals harder to defend when individual grounds are marginal. Our analysis found that refusals citing 4+ policy grounds are overturned on appeal at a rate of 54%, versus 31% for single-ground refusals. Boroughs that issue multi-ground refusals as standard practice are accepting a materially higher appeal-overturn risk.
“Refusals citing 4 or more policy grounds are overturned at appeal at a rate of 54%. The correlation between refusal complexity and appeal success suggests that multi-ground refusals often reflect officer uncertainty rather than policy clarity.”
— Stormglass Research analysis of PINS appeal decisions, 2022–2024
Policy references were extracted from decision notice PDFs using a rule-based parser trained on London Plan 2021 chapter and policy numbering conventions. Local Plan policies were matched by borough. Where policy references were ambiguous (e.g. 'Policy D' without a sub-number), they were excluded from the analysis. The dataset covers decisions where the LPA published a formal decision notice — approximately 84% of refused applications in the PLD dataset for the period.