Substation · 275 kV · gsp

Laleham GSP

SSEN Distribution · England / SEPD, United Kingdom

Latest published values

4 served · 0 withheld

Each row is what the operator’s latest published dataset reports for one combination of direction, technology, measure, firmness and horizon. Hosting-capacity figures are indicative and reflect what operators publish. They are not a connection offer; only the operator can confirm capacity for a specific request.

Latest published capacity values, one row per series
Direction	Technology	Measure	Value	Firmness	Horizon	Source date
Injection	Generation (any)	Available	—	Unknown	Now (snapshot)	11 Mar 2026
Injection	Generation (any)	Connected	16.61 MW	Unknown	Now (snapshot)	11 Mar 2026
Injection	Generation (any)	Contracted	551.74 MW	Unknown	Now (snapshot)	11 Mar 2026
Offtake	Battery	Contracted	463.16 MVA	Unknown	Now (snapshot)	11 Mar 2026
Offtake	Load (any)	Available	—	Unknown	Now (snapshot)	11 Mar 2026
Offtake	Load (any)	Contracted	141.52 MVA	Unknown	Now (snapshot)	11 Mar 2026

SSEN Distribution; Generation Availability and Network Capacity — Headroom Dashboard Data; https://data.ssen.co.uk/@ssen-distribution/generation-availability-and-network-capacity; CC BY 4.0 (last updated 2026-03-11)

What each value means

Methodology, both clocks, provenance and rights

Injection · Generation (any) · Available

—

Published in MW; no MW figure is derived from it.

Granted

The operator's latest published dataset reports no value (published as unknown) under methodology gb_ssen_headroom_dashboard_2025.

Firmness: Unknown
Horizon: Now (snapshot)
Methodology: gb_ssen_headroom_dashboard_2025SSEN Generation Availability and Network Capacity — Methodology Statementbasis operator calculated · network state unknown · comparability class gb_ssen_headroom_dashboardNot additive across assets. The method accounts for reserved: not stated · allocated: not stated · pre-reserved: not stated · pending requests: not stated
Operator’s date: 11 Mar 2026
Retrieved / confirmed: 2026-09-26 02:46 UTClast confirmed unchanged 2026-09-26 02:47 UTC
Source health: Healthy
Provenance: gb_ssen_headroom_dashboardrecord E - LALE - 01 · payload sha256 8c4568457f44…Operator’s publication (opens the operator’s site)
Licence: CC BY 4.0Attribution: SSEN Distribution; Generation Availability and Network Capacity — Headroom Dashboard Data; https://data.ssen.co.uk/@ssen-distribution/generation-availability-and-network-capacity; CC BY 4.0 (last updated 2026-03-11)
Decision context: Not binding · indicative · a formal connection study is required
Operator note: constraint: Substation Thermal Capacity
Operator note: rag status: Red
Operator note: source field: estimated_generation_headroom__mw_
Operator note: source label: N/A
Operator note: technical limits agreed at gsp: Yes

Injection · Generation (any) · Connected

16.61 MW

Granted

The operator's latest published dataset reports 16.61 MW under methodology gb_ssen_headroom_dashboard_2025.

Firmness: Unknown
Horizon: Now (snapshot)
Methodology: gb_ssen_headroom_dashboard_2025SSEN Generation Availability and Network Capacity — Methodology Statementbasis operator calculated · network state unknown · comparability class gb_ssen_headroom_dashboardNot additive across assets. The method accounts for reserved: not stated · allocated: not stated · pre-reserved: not stated · pending requests: not stated
Operator’s date: 11 Mar 2026
Retrieved / confirmed: 2026-09-26 02:46 UTClast confirmed unchanged 2026-09-26 02:47 UTC
Source health: Healthy
Provenance: gb_ssen_headroom_dashboardrecord E - LALE - 01 · payload sha256 8c4568457f44…Operator’s publication (opens the operator’s site)
Licence: CC BY 4.0Attribution: SSEN Distribution; Generation Availability and Network Capacity — Headroom Dashboard Data; https://data.ssen.co.uk/@ssen-distribution/generation-availability-and-network-capacity; CC BY 4.0 (last updated 2026-03-11)
Decision context: Not binding · indicative · a formal connection study is required
Operator note: source field: connected_generation__mw_

Injection · Generation (any) · Contracted

551.74 MW

Granted

The operator's latest published dataset reports 551.74 MW under methodology gb_ssen_headroom_dashboard_2025.

Firmness: Unknown
Horizon: Now (snapshot)
Methodology: gb_ssen_headroom_dashboard_2025SSEN Generation Availability and Network Capacity — Methodology Statementbasis operator calculated · network state unknown · comparability class gb_ssen_headroom_dashboardNot additive across assets. The method accounts for reserved: not stated · allocated: not stated · pre-reserved: not stated · pending requests: not stated
Operator’s date: 11 Mar 2026
Retrieved / confirmed: 2026-09-26 02:46 UTClast confirmed unchanged 2026-09-26 02:47 UTC
Source health: Healthy
Provenance: gb_ssen_headroom_dashboardrecord E - LALE - 01 · payload sha256 8c4568457f44…Operator’s publication (opens the operator’s site)
Licence: CC BY 4.0Attribution: SSEN Distribution; Generation Availability and Network Capacity — Headroom Dashboard Data; https://data.ssen.co.uk/@ssen-distribution/generation-availability-and-network-capacity; CC BY 4.0 (last updated 2026-03-11)
Decision context: Not binding · indicative · a formal connection study is required
Operator note: source field: contracted_generation__mw_

Offtake · Battery · Contracted

463.16 MVA

Published in MVA; no MW figure is derived from it.

Granted

The operator's latest published dataset reports 463.16 MVA under methodology gb_ssen_headroom_dashboard_2025.

Firmness: Unknown
Horizon: Now (snapshot)
Methodology: gb_ssen_headroom_dashboard_2025SSEN Generation Availability and Network Capacity — Methodology Statementbasis operator calculated · network state unknown · comparability class gb_ssen_headroom_dashboardNot additive across assets. The method accounts for reserved: not stated · allocated: not stated · pre-reserved: not stated · pending requests: not stated
Operator’s date: 11 Mar 2026
Retrieved / confirmed: 2026-09-26 02:46 UTClast confirmed unchanged 2026-09-26 02:47 UTC
Source health: Healthy
Provenance: gb_ssen_headroom_dashboardrecord E - LALE - 01 · payload sha256 8c4568457f44…Operator’s publication (opens the operator’s site)
Licence: CC BY 4.0Attribution: SSEN Distribution; Generation Availability and Network Capacity — Headroom Dashboard Data; https://data.ssen.co.uk/@ssen-distribution/generation-availability-and-network-capacity; CC BY 4.0 (last updated 2026-03-11)
Decision context: Not binding · indicative · a formal connection study is required
Operator note: source field: contracted_bess_demand__mva_

Offtake · Load (any) · Available

—

Published in MVA; no MW figure is derived from it.

Granted

The operator's latest published dataset reports no value (published as unknown) under methodology gb_ssen_headroom_dashboard_2025.

Firmness: Unknown
Horizon: Now (snapshot)
Methodology: gb_ssen_headroom_dashboard_2025SSEN Generation Availability and Network Capacity — Methodology Statementbasis operator calculated · network state unknown · comparability class gb_ssen_headroom_dashboardNot additive across assets. The method accounts for reserved: not stated · allocated: not stated · pre-reserved: not stated · pending requests: not stated
Operator’s date: 11 Mar 2026
Retrieved / confirmed: 2026-09-26 02:46 UTClast confirmed unchanged 2026-09-26 02:47 UTC
Source health: Healthy
Provenance: gb_ssen_headroom_dashboardrecord E - LALE - 01 · payload sha256 8c4568457f44…Operator’s publication (opens the operator’s site)
Licence: CC BY 4.0Attribution: SSEN Distribution; Generation Availability and Network Capacity — Headroom Dashboard Data; https://data.ssen.co.uk/@ssen-distribution/generation-availability-and-network-capacity; CC BY 4.0 (last updated 2026-03-11)
Decision context: Not binding · indicative · a formal connection study is required
Operator note: constraint: Substation Thermal Capacity
Operator note: rag status: Red
Operator note: source field: estimated_demand_headroom__mva_
Operator note: source label: N/A

Offtake · Load (any) · Contracted

141.52 MVA

Published in MVA; no MW figure is derived from it.

Granted

The operator's latest published dataset reports 141.52 MVA under methodology gb_ssen_headroom_dashboard_2025.

Firmness: Unknown
Horizon: Now (snapshot)
Methodology: gb_ssen_headroom_dashboard_2025SSEN Generation Availability and Network Capacity — Methodology Statementbasis operator calculated · network state unknown · comparability class gb_ssen_headroom_dashboardNot additive across assets. The method accounts for reserved: not stated · allocated: not stated · pre-reserved: not stated · pending requests: not stated
Operator’s date: 11 Mar 2026
Retrieved / confirmed: 2026-09-26 02:46 UTClast confirmed unchanged 2026-09-26 02:47 UTC
Source health: Healthy
Provenance: gb_ssen_headroom_dashboardrecord E - LALE - 01 · payload sha256 8c4568457f44…Operator’s publication (opens the operator’s site)
Licence: CC BY 4.0Attribution: SSEN Distribution; Generation Availability and Network Capacity — Headroom Dashboard Data; https://data.ssen.co.uk/@ssen-distribution/generation-availability-and-network-capacity; CC BY 4.0 (last updated 2026-03-11)
Decision context: Not binding · indicative · a formal connection study is required
Operator note: source field: contracted_demand_excl_bess__mva_

History

Served series only

Offtake · Load (any) · Contracted

current 141.52 MVA

26 Sep 2026range 141.52–141.52 MVA26 Sep 2026

1 published value, as a table

Observed from	Until	Value
26 Sep 2026	current	141.52 MVA

Time axis: when we observed each value, not the operator’s effective date.

Offtake · Battery · Contracted

current 463.16 MVA

26 Sep 2026range 463.16–463.16 MVA26 Sep 2026

1 published value, as a table

Observed from	Until	Value
26 Sep 2026	current	463.16 MVA

Time axis: when we observed each value, not the operator’s effective date.

Injection · Generation (any) · Connected

current 16.61 MW

26 Sep 2026range 16.61–16.61 MW26 Sep 2026

1 published value, as a table

Observed from	Until	Value
26 Sep 2026	current	16.61 MW

Time axis: when we observed each value, not the operator’s effective date.

Injection · Generation (any) · Contracted

current 551.74 MW

26 Sep 2026range 551.74–551.74 MW26 Sep 2026

1 published value, as a table

Observed from	Until	Value
26 Sep 2026	current	551.74 MW

Time axis: when we observed each value, not the operator’s effective date.

Through the API

$ curl "https://api.gridcapacityapi.com/v1/substations/sub_06gdq6zvvstyv6qe18vs3xc8bm/capacity" \  -H "Authorization: Bearer gc_live_..."