17 May 2023

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

Board change

The Company today announces that Thérèse Esperdy has decided to step down from the Board as a Non-Executive Director on 31 December 2023 after serving more than nine years.

Paula Reynolds, Chair of National Grid, said "Thérèse has been a person of extraordinary commitment and insight during her tenure.  The board composition has changed significantly over recent years and Thérèse's presence has been invaluable. I am grateful for her willingness to remain until the end of the year to facilitate an orderly succession."

This announcement is made in accordance with Listing Rule 9.6.11.

Pritti Patel

General Counsel, Corporate and Deputy Company Secretary