These are modelling slots, not promises or measured results. Their values have intentionally not been filled.
Small Party scenario Not yet modelled
Additional annual housing completions attributable to policy
housing · 5 years · Confidence: unrated
No projection published. Low, central and high values remain blank until a sourced model is specified.
Modelling rule: Model permissions, starts, completions, construction capacity and lag. Do not invent uplift.
Baseline sources to use
Small Party scenario Not yet modelled
Net Exchequer effect of tax package
tax and growth · 5 years · Confidence: unrated
No projection published. Low, central and high values remain blank until a sourced model is specified.
Modelling rule: Use OBR baseline and published ready-reckoners/elasticities. Never assume a tax cut pays for itself.
Baseline sources to use
Small Party scenario Not yet modelled
Additional annual productivity growth from policy
economy · 5 years · Confidence: unrated
No projection published. Low, central and high values remain blank until a sourced model is specified.
Modelling rule: 0.7% is an observed YoY flash estimate, not a trend assumption. Model incremental effects separately.
Baseline sources to use
Small Party scenario Not yet modelled
Change in RTT waiting list / 18-week performance
nhs · 5 years · Confidence: unrated
No projection published. Low, central and high values remain blank until a sourced model is specified.
Modelling rule: Import official June 2026 national RTT totals before modelling demand, activity, workforce and productivity.
Baseline sources to use
Small Party scenario Not yet modelled
Net migration under proposed rules
immigration · 5 years · Confidence: unrated
No projection published. Low, central and high values remain blank until a sourced model is specified.
Modelling rule: Separate work, study, family, humanitarian and British flows; model immigration and emigration.
Baseline sources to use
Small Party scenario Not yet modelled
Net fiscal impact of complete programme
public finances · 5 years · Confidence: unrated
No projection published. Low, central and high values remain blank until a sourced model is specified.
Modelling rule: Score policies against OBR baseline; reconcile interactions; separate direct, behavioural, macro and financing effects.
Baseline sources to use