# EDGAR Filing Document

**Accession Number:** 0001004315
**File Stem:** 0001654954-25-013868
**Filing Date:** 2025-12
**Character Count:** 4497
**Document Hash:** 05715869b86652bfc97283d842394c5f
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001654954-25-013868.hdr.sgml**: 20251211

**ACCESSION NUMBER**: 0001654954-25-013868

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251211

**FILED AS OF DATE**: 20251211

**DATE AS OF CHANGE**: 20251211

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** NATIONAL GRID PLC
- **CENTRAL INDEX KEY:** 0001004315
- **STANDARD INDUSTRIAL CLASSIFICATION:** NATURAL GAS TRANSMISSION [4922]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 980367158
- **FISCAL YEAR END:** 0331

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-14958
- **FILM NUMBER:** 251565847

**BUSINESS ADDRESS:**
- **STREET 1:** 1-3 STRAND
- **CITY:** LONDON
- **STATE:** X0
- **ZIP:** WC2N 5EH
- **BUSINESS PHONE:** (44) 207 004 3220

**MAIL ADDRESS:**
- **STREET 1:** 1-3 STRAND
- **CITY:** LONDON
- **STATE:** X0
- **ZIP:** WC2N 5EH

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NATIONAL GRID TRANSCO PLC
- **DATE OF NAME CHANGE:** 20021121

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NATIONAL GRID GROUP PLC
- **DATE OF NAME CHANGE:** 19991007

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NATIONAL GRID HOLDING PLC
- **DATE OF NAME CHANGE:** 19991007

**UNITED STATES**

 **SECURITIES AND EXCHANGE COMMISSION**

 **Washington D.C. 20549**

 **FORM 6-K**

 **REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934**

 **Date: 11 December 2025**

 **Commission File Number: 001-14958**

 **NATIONAL GRID plc**

(Translation of registrant's name into English)

 **England and Wales**

(Jurisdiction of Incorporation)

 **1-3 Strand, London, WC2N 5EH, United Kingdom**

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

☒ Form 20-F ☐ Form 40-F

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ☐

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3- 2(b) under the Securities Exchange Act of 1934. ☐ Yes ☒ No

If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): n/a

 **EXHIBIT INDEX**

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| | |
|:---|:---|
| **Exhibit No.**<br>| **Description** <br>|
| 99.1<br>| Exhibit 99.1 Announcement sent to the London Stock Exchange on 11 December 2025 — Outcome of audit tender process |

---

Exhibit 99.1

 **11 December 2025**

 **National Grid plc ('National Grid' or the 'Company')**

 **Outcome of audit tender process**

National Grid announces that, following the conclusion of a formal competitive audit tender process led by the Audit & Risk Committee, the Board has approved the proposed re-appointment of Deloitte LLP ("Deloitte") as external auditor to take effect from, and including, the financial year ending 31 March 2028. The re-appointment is subject to shareholder approval at the 2027 Annual General Meeting. Deloitte will continue as the Company's external auditor for the financial years ending 31 March 2026 and, subject to shareholder approval at the 2026 Annual General Meeting, 31 March 2027.

In line with the UK Statutory Audit Services for Large Companies Market Investigation (Mandatory Use of Competitive Tender Processes and Audit Committee Responsibilities) Order 2014, the Company is required to tender the statutory audit every 10 years and rotate every 20 years. The Company initially appointed Deloitte as the statutory auditor with effect from the year ending 31 March 2018.

Information on the audit tender process will be included in the Company's 2026 Annual Report and Accounts.

 **Julian Baddeley**

 **Group Company Secretary**

 **SIGNATURE**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp; NATIONAL GRID plc | &nbsp;&nbsp;&nbsp; NATIONAL GRID plc |
|  ***By:***<br>|  ***Beth Melges***<br>|
|  | Beth Melges<br> Head of Plc Governance<br>|

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Date: 11 Decemeber 2025 &#xD; <br>