SECURITIES AND EXCHANGE COMMISSION

Washington D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

OF THE SECURITIES EXCHANGE ACT OF 1934

Date: 9 November 2023

Commission File Number: 001-14958

NATIONAL GRID plc

(Registrant’s Name)

1-3 Strand

London WC2N 5EH, England

(Registrant’s Address)

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

INCORPORATION BY REFERENCE

This report and Exhibit 99.1 of this report on Form 6-K shall be deemed to be incorporated by reference into the registration statements on Form F-3 (Registration Number 333-256888) and Form S-8 (Registration Numbers 333-184558, 333-170716, 333-175852, 333-155527, 333-149828, 333-107727, 333-103768, 333-97249, 333-65968, and 333-33094) of National Grid plc (the "Company") (including any prospectuses forming a part of such registration statements) and to be a part thereof from the date on which this report is filed, to the extent not superseded by documents or reports subsequently filed or furnished.

Please see Exhibit 99.1 Announcement sent to the London Stock Exchange on 9 November 2023 — 'National Grid 2023/24 Half Year Results Statement'

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.

NATIONAL GRID plc
By:	/s/Pritti Patel _______________________
	Pritti Patel Company Secretary

Date: 9 November 2023

EXHIBIT INDEX

Exhibit No.	Description
99.1	Exhibit 99.1 Announcement sent to the London Stock Exchange on 9 November 2023 — 'National Grid 2023/24 Half Year Results Statement'