NATIONAL ENERGY SYSTEM OPERATOR LIMITED: Contract Register & Procurement Profile

GOV.UK register: Public corporationOther public bodySouth East EnglandWokingham

Companies House10841592 ↗Websiteneso.energy ↗

Open now0no live notices
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Tenders you can still bid for.

Notices at tender stage whose deadline has not passed.

Notices, last 12 months31+121% vs prior 12 months (14)
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Notices published in the last 12 months.

Counted per tender, not per lot, against the 12 months before where shown.

Top-3 supplier share50%of 12 awarded procedures · 13 suppliers
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How much of this buyer’s work goes to its three most frequent suppliers.

Share of its awarded tenders that name at least one of the top three. Each tender is counted once.

12 awarded tenders, 13 different suppliers.

Describes the record. It is not a sign of favouritism.

All awards we hold.

Contracts ending ≤18 months3none within 6 months
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Contracts that finish in the next 18 months.

Published contracts with an end date in that window. No end date, not counted.

A likely retender, not a certain one.

Published award value, 24m£34mnet · on 8 of 12 single-supplier awards · top 5 = 85%
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How much this buyer has awarded recently, by published values.

Sum of award values to single suppliers, VAT excluded, on notices from the last 24 months. Framework ceilings and repeated totals are left out.

Published values, not actual spend. The biggest rows are listed so you can check.

What they buy
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What kind of work is bought here.

Notices by procurement category (CPV). A notice with several categories counts in each.

Last 24 months · CPV divisions on published procedures · a notice with several divisions counts in each

How they buy
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How work here is packaged.

Notices by commercial tool: a single contract, a framework, or a dynamic purchasing system.

Last 24 months · 45 notices · commercial tool and route as published on the notice, not a legal-regime claim

Commercial tool
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How work here is packaged.

Notices by commercial tool: a single contract, a framework, or a dynamic purchasing system.

  • Contract 73% (33 notices)
  • Framework 27% (12 notices)
Procedure route
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Which procedures buyers here use.

Notices by the procedure they declare: open, selective, limited or direct. Open and selective are competitions; limited and direct are not.

  • Route not published 44% (20 notices)
  • Selective 24% (11 notices)
  • Limited / restricted 13% (6 notices)
  • Direct award 11% (5 notices)
  • Open 7% (3 notices)
Typical bids per lot
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How many companies usually bid when this buyer runs a tender.

Middle value of the bid counts on its award notices, one per lot. Only real competitions count: direct awards and framework places are left out.

Based on 1 lots from this buyer’s competitions, last 24 months. Small sample.

Last 24 months, all categories.

3indicative · n=10% of lots drew a single bid
Notice amendments
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How often this buyer changes a notice after publishing it.

Middle number of amendments per notice. Deadline extensions and corrections both count.

Based on 45 notices across all categories, last 24 months.

Last 24 months.

07 of 45 notices amended
Award vs estimate
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Do this buyer’s awards land above or below its own estimates.

Each lot’s published estimate against its award, on this buyer’s competitions, like for like.

Based on 1 lots with both an estimate and an award, last 24 months. Small sample.

A past pattern, not a price to bid.

Last 24 months.

10% above estimateindicative · n=1

Who wins here
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Which suppliers win the most here.

Suppliers ranked by the number of tenders won, not by money. A supplier on one big framework with many call-offs does not outrank one that won many separate competitions.

All published awards naming a supplier · ranked by distinct procedures, not pounds · panel and call-off entries inflate award records

SupplierProceduresShareLast 24mAward recordsLast activity
Efficio Ltd325%339 Feb 2026
Gowling WLG (UK) LLPframework/DPS on 1216.7%2223 Apr 2026
TLT LLPframework/DPS on 1216.7%2221 Jul 2026
Dentons UK & Middle East LLPframework/DPS on 118.3%1215 Jan 2026
Salesforce UK Limited18.3%1226 Jun 2026
Addleshaw Goddard LLPframework/DPS on 118.3%1215 Jan 2026
DLA Piperframework/DPS on 118.3%1215 Jan 2026
Jones Lang LaSalle Ltd18.3%1124 Apr 2026

The three most frequent suppliers are named on 50% of 12 awarded procedures (each procedure counted once, so a panel shared by several of them is not double-counted); 13 distinct suppliers hold at least one. Descriptive concentration of published awards — not a statement of preference.

Published award value (24m)
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How much this buyer has awarded recently, by published values.

Sum of award values to single suppliers, VAT excluded, on notices from the last 24 months. Framework ceilings and repeated totals are left out.

Published values, not actual spend. The biggest rows are listed so you can check.

£34mSum of published VAT-exclusive values on 8 of 12 single-supplier awards; the five largest make 85%; a further 1 published a VAT-inclusive amount only (£1.9m inc. VAT, kept apart).
Typical single-supplier award (24m)
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What one of this buyer’s contracts is usually worth.

Middle value of the same awards as the total above.

Last 24 months.

£2.5m middle valuerobust · n=8Middle half £2.0m–£4.9m.
Largest published awards
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The biggest published awards.

Awards to a single supplier with a published value, largest first, so you can check the totals against the notice.

A repeated framework total can appear here. Open the notice to check.

SupplierAwardedTermPublished value
Microsoft Enterprise and On-Premise Infrastructure Licensing AgreementInsight Direct——£11,836,235 †
Procurement Services - Operations, Indirects & Digital Data Technology (DD&T)Efficio Ltd9 Feb 20262 yrs · up to 4 yrs£7,700,000
≈ £3.9m/yr
Salesforce Platform Licensing and Support ServicesSalesforce UK Limited—1 yrs£4,008,005
≈ £4.0m/yr
Operator ConsoleProAv Limited——£2,540,037 †
NESO-JLL Surveyor Agency Service AgreementJones Lang LaSalle Ltd24 Apr 20263 yrs · up to 5.1 yrs£2,500,000
≈ £833k/yr

Contracts ending
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Contracts that finish in the next 18 months.

Published contracts with an end date in that window. No end date, not counted.

A likely retender, not a certain one.

Published end dates only · 9 of 39 contracts carry one · not a retender forecast

Recent procedures

Latest 50 of 50 procedures on this authority cluster, incl. beneficiary and procuring-entity roles

ProcedureStatusPublishedPublished value
Security Information Event and Management Software and Professional ServicesSoftware-related servicesAwarded / complete16 May 2025—
Financial Audit ServicesFinancial auditing servicesOpen5 Mar 2025£5,000,000
Physical Security Operation ServicesSecurity servicesPlanning24 Jan 2025£500,000
PENETRATION TESTING SERVICESBusiness transaction and personal business software packagePlanned13 Jan 2025£750,000
Tender for Audit Services: National Energy System OperatorAuditing servicesPlanned20 Nov 2024£5,000,000
NGESO Software/Hardware Technology Products & Associated Services3 lotsHardwarePlanned28 Mar 2024—
Digital and Data Capabilities FrameworkFramework5 lotsIT services: consultingPlanned21 Mar 2024—
National Grid ESO - Cyber Incident Response and Digital ForensicsIT services: consultingPlanned2 Aug 2023—
Digital, Data and Technology Digital ​Agile DevSecOps ​Transformation ​OfficeIT services: consultingPlanned25 Apr 2023—
Managed Cyber Security Operations Centre and Security Information & Event ManagementIT services: consultingPlanned11 Apr 2023—

Search all 50 procedures for this authority →

Data coverage & method
  • Source: Find a Tender OCDS releases; mixed PCR 2015 / Procurement Act 2023 history — no legal-regime label is applied.
  • Counts are procedures (one notice family), not lots. Authority cluster = canonical buyer plus beneficiary and procuring-entity roles.
  • Published procedure values exist on a minority of notices; their lifetime sum (£50m, ceilings stripped) is a catalogue fact, not spend, and is not shown as a headline.
  • Awards on procedures published in the last 24 months: 40 award records on 14 procedures (12 to a single canonical supplier, 2 multi-supplier, 26 with no supplier published). 2 values come from the contract record when the award carried none; 1 awards published only a VAT-inclusive amount and are counted but not valued.
  • Bid counts, deadline-to-award, amendments and award-vs-estimate come from the nightly buyer analytics row; each figure’s own method and sample is behind its , the long form on Methodology.
  • Contract end dates: 9 of 39 published contracts carry a period end; 3 end within 18 months, 0 within 6.
  • Never shown: contact details, predicted winners, payment behaviour, or “who to invite”.
Identifiers consolidated into this page (9 historical Find a Tender publication identifiers)

Official notices referenced this authority under these publication identifiers. Alias URLs are not separate pages.

GB-COH-11014226GB-COH-NATIONAL ENERGY SYSTEM OPERATOR LIMITEDGB-COH-NESO0012GB-COH-ocds-h6vhtk-04d52dGB-FTS-134787GB-FTS-136253GB-FTS-139908GB-FTS-142906GB-FTS-144149

Canonical page id: GB-COH-10841592