System operational · UK tenders
Awarded
ocds-h6vhtk-052237 · award

Legal Services Framework

NATIONAL ENERGY SYSTEM OPERATOR LIMITED

Estimated Value

£8,900,000 – £16,500,000

Deadline

6 November 2025

Published

25 February 2026

Type

Not specified

South EastGBopen

Overview

National Energy System Operator (NESO) is awarding a framework agreement under competitive flexible procedure across a full range of legal services to support NESO's requirements and activities. Suppliers will partner with the internal NESO Legal team to provide high quality advice and support NESO to meet its objectives.

This includes: 1. Advising on the specific rules applicable to NESO, as well as on the regimes applicable to other sector participants including transmission networks, distribution networks, interconnectors, generators, storage and suppliers as are or may be relevant to NESO's activities. 2.

Advising on matters relating to the interaction of the UK and EU regulatory regimes with the gas and electricity arrangements, including relationships with European institutions such as ENTSO-E and ENTSOG. 3. Advising on any innovation matters that arise as the gas and electricity markets and regulatory regimes develop. 4.

Lots (2)

  • Lot 1Energy Regulation & Frameworks Advising on all aspects of the United Kingdom (UK) and, where relevant, European Union (EU) regulatory regimes and frameworks for gas and electricity, including sector-specific European legislation and rules (where relevant) and Great Britain (GB) primary and secondary legislation that impacts on or are relevant to the business activities of NESO (licensed and unlicensed)
  • Lot 2GENERAL SERVICES This lot includes advising NESO on all corporate and commercial aspects of its operations to support its organisational functions, taking into account NESO's status as a public corporation

Regulations cited

  • Energy Act 2023

Additional details

Advising on all matters relating to the compliance with the UK and EU regulatory regimes for electricity and gas and how they impact on all the activities of NESO in Great Britain, including the impact on contractual arrangements NESO has with third parties. 5. Advising on the specific legal framework applicable to NESO as the designated independent system operator and planner under the Energy Act 2023 including: 5.1 Advising on the application of NESO's general statutory duties to its activities, including its duty to have regard to the Strategy and Policy Statement. 5.2 Advising NESO on the use of its power to request information. 5.3 Advising on NESO's independence requirements and requirements relating to conflict of interest. 6.

Advising on the sector specific commercial arrangements relevant to NESO's energy activities, as set out in further detail below. More specific areas within Lot 1 are detailed below - no subcontracting is allowed cross Lot 1 disciplines: 1 Electricity/ gas codes 2 Electricity connections 3 Balancing services (electricity) 4 Electricity interconnectors 5 Electricity Market Reform 6 Network competition 7 Gas markets 8 Developing/adapting to new energy legal frameworks 9 Licence change, investigations and other regulatory issues 10 Public Investigation and inquiry processes 11 Planning and major infrastructure projects 12 Information management (energy) 13 Public Law (energy) 14 Competition law and dawn raids (energy) 15 Litigation (energy) The requirements for advice and support set out in this Lot 1 relate to both non-contentious and contentious matters unless expressly stated otherwise.

More specific areas within Lot 1 are detailed below -subcontracting permitted only for specific Lot 2 disciplines (Trademark & Patent Services, Pensions, and Insurance): 1 General commercial and transactions 2 Public procurement 3 Technology expertise (including Cyber Security, AI, ICT & IoT) 4 Innovation 5 Commercial property/ construction 6 Corporate 7 Finance 8 Intellectual Property (including trademark and patent services) 9 Health, safety and environmental 10 Employment 11 Pensions 12 Insurance (including insurance claims) 13 Information Management (non-energy) 14 Public Law (non-energy) 15 Competition law & dawn raids (non-energy) 16 Litigation (non-energy) The requirements for advice and support set out in this Lot 2 relate to both non-contentious and contentious matters unless expressly stated otherwise. Individual workpackages will be awarded to suppliers based on the call-off mechanism detailed in the framework agreement.

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Award Details

SHAKESPEARE MARTINEAU LLP

15 Jan 202631 Jan 2026 – 31 Jan 2029

£16,500,000

GOWLING WLG (UK) LLP

15 Jan 202631 Jan 2026 – 31 Jan 2029

£16,500,000

DENTONS UK AND MIDDLE EAST LLP

15 Jan 202631 Jan 2026 – 31 Jan 2029

£16,500,000

ADDLESHAW GODDARD LLP

15 Jan 202631 Jan 2026 – 31 Jan 2029

£16,500,000

DLA PIPER UK LLP

15 Jan 202631 Jan 2026 – 31 Jan 2029

£16,500,000

TLT LLP

15 Jan 202631 Jan 2026 – 31 Jan 2029

£8,900,000

Likely incumbents

Suppliers who won similar work from this buyer in the last 5 years.

5 found
  1. 1

    EFFICIO LIMITED

    3 contracts wonlatest 9 Feb 2026ends 23 Mar 2028CH 04010379

    £8m

    total awarded

  2. 2

    Hewlett Packard Ltd t/a Hewlett Packard Enterprise

    1 contract wonlatest 12 Oct 2026ends 31 Dec 2027CH 00690597

    £2m

    total awarded

  3. 3

    PALANTIR TECHNOLOGIES UK, LTD.

    1 contract wonlatest 6 Oct 2026CH 07042994

    £17m

    total awarded

  4. 4

    HORSEMAN COACHES LIMITED

    1 contract wonlatest 29 Sept 2026ends 14 Oct 2029CH 01339276

    £2m

    total awarded

  5. 5

    Unicorn Grid Systems a.s.

    1 contract wonlatest 26 Aug 2026ends 7 Sept 2031

    £1m

    total awarded

EFFICIO LIMITED is the most likely incumbent based on recency and category match. To win, bidders typically need a clearly differentiated proposition or a price advantage.

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Buyer Profile

NATIONAL ENERGY SYSTEM OPERATOR LIMITED
Typepublic body
RegionUKJ11
Total tenders46
Total spend£389,354,855
View buyer profile

Key Dates

Published

25 February 2026

Submission deadline

6 November 2025

Notice type

award

Source

find a tender

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