Methodology note
Increase public health grants: note
Models increase public health grants in 2028-29. The estimate is illustrative and excludes wider package interactions.
Central fiscal result
+£1.5bn - Net fiscal impact in 2028-29
Low case: +£1.0bn. High case: +£3.0bn. Positive numbers are fiscal costs or borrowing pressure. Negative numbers are Exchequer savings or receipts.
Scenario and baseline
- Models increase public health grants by 2028-29.
- Baseline is current policy or published departmental plans.
- Central case uses published party or official anchors where available.
- Wider manifesto interactions are excluded unless stated.
Affected population
- Affected units are people, firms, households or providers depending on policy.
- Direct exposure follows the manifesto or government target group.
- Indirect exposure includes suppliers, workers, consumers and taxpayers.
- Weakest counts are widened in the low and high cases.
Gross impact
- Published anchor or scenario central is +£1.5bn in 2028-29.
- Gross costs or receipts are adjusted for behaviour and delivery risk.
- Tax, benefit or procurement offsets are separated in the fiscal build-up.
- The range is deliberately wider where implementation detail is thin.
Fiscal build-up, central case
- Gross programme or delivery cost: +£1.7bn
- Tax and receipt offsets: -£0.1bn
- Administration and evaluation: +£0.1bn
- Behavioural and pass-through effects: -£0.2bn
Central net impact: +£1.5bn in 2028-29.
Behaviour and pass-through
- Low case assumes stronger delivery or receipts than central.
- Central case applies moderate behavioural leakage and pass-through.
- High case allows weaker delivery, larger take-up or higher costs.
- Output effects follow incidence, capacity and investment channels.
- Distributional gains do not automatically imply GDP gains.
Phasing
- 2026-27: +£0.2bn. Phased implementation and take-up.
- 2027-28: +£0.8bn. Phased implementation and take-up.
- 2028-29: +£1.5bn. Phased implementation and take-up.
- 2029-30: +£1.5bn. Phased implementation and take-up.
Main source groups
- Institute for Fiscal Studies, "Green Party manifesto: a reaction" (2024): Used to define the pledge wording, policy scope and implementation scenario being modelled.
- Local Government Association, "Green Party manifesto summary" (2024): Used to define the pledge wording, policy scope and implementation scenario being modelled.
- Heckman, "Skill Formation and the Economics of Investing in Children" (Science, 2006): Early childhood investments can have high returns when targeted well and delivered effectively; relevant to nurseries and early years.
- Psacharopoulos and Patrinos, "Returns to Investment in Education" (Education Economics, 2018): Education has positive private and social returns, though quality and targeting matter; supports education spending with delivery caveats.
- NHS England, "NHS priorities and operational planning guidance" (2025): NHS guidance identifies capacity, waiting-list, workforce and productivity constraints across services; extra funding may not translate quickly into output.
- HM Treasury, "Spending Review 2025" (2025): Spending Review settlements define the public-spending counterfactual for health budgets; used to distinguish new funding from baseline growth.
- Green Party of England and Wales, "Manifesto for a Fairer, Greener Country" (2024): The manifesto defines the tax, spending, climate, housing and public-service proposals modelled here; used to define the scenario, not as an official costing.