TPC overall charges forecast

get

https://api.cornwall-insight.com/external/v1/tpc/overall_charges

Third Party Charges forecast, real p/kWh in 2026-27 prices. Every row is one component for one fuel, archetype, region and forecast year. Sensitivity parameters (cm_consumption, cfd_scenario, riioed3, riioet3) each default to the published headline case, so a call with no sensitivity parameters returns the headline forecast. Supplying a sensitivity returns the FULL component stack under the chosen scenario: every component is returned once, reflecting the selected value on the axes that apply to it and its headline value on the axes that do not. Each sensitivity axis takes one value per call.

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Query Params

archetypes

array of strings

Comma-separated. Consumer archetypes.

archetypes

Allowed:

fuel_types

array of strings

Comma-separated. Electricity and/or Gas.

fuel_types

Allowed:

electricity_regions

array of strings

Comma-separated GSP groups. Filters electricity rows only; gas rows are unaffected. To return electricity alone, also send fuel_types=Electricity.

electricity_regions

gas_regions

array of strings

Comma-separated Local Distribution Zones. Filters gas rows only; electricity rows are unaffected. To return gas alone, also send fuel_types=Gas.

gas_regions

cm_consumption

string

enum

Defaults to All

Capacity Market consumption basis. Applies to the Capacity Market (CM) component only. Default All.

Allowed:

cfd_scenario

string

enum

Defaults to Central

Contracts for Difference generation / power-price scenario. Applies to the CfD component only. Default Central.

riioed3

string

enum

Defaults to Central

RIIO-ED3 distribution price-control sensitivity. Applies to the Distribution component and the EII Support Levy. Values are identical across cases until 2028-29, when RIIO-ED3 begins, and diverge from that year onward. Default Central.
Renamed in 0.3.0: Baseline, Sensitivity Case 1 and Sensitivity Case 2 are now Low, Central and High. The default moved from Baseline to Central, so the values returned with no parameter have changed.

Allowed:

riioet3

string

enum

Defaults to Baseline

RIIO-ET3 transmission price-control sensitivity. Applies to the Transmission component and the EII Support Levy. Values are identical across cases until 2028-29 and diverge from that year onward. Default Baseline.
Renamed in 0.3.0: Sensitivity Case 1 and Sensitivity Case 2 are now Medium and High. Baseline and the default are unchanged.

Allowed:

from_date

integer

Earliest forecast year, as the starting calendar year (e.g. 2027 for 2027-28).

to_date

integer

Latest forecast year, as the starting calendar year.

include_nulls

boolean

Defaults to false

Include rows with a null value. Default false.

Responses

200OK

400A sensitivity parameter was supplied with a value that is not valid for the current publication. Also returned for the withdrawn bics parameter.

401Authentication credentials missing or invalid.