Director Declaration

15 June 2017

National Grid plc ('National Grid')Director's Other Appointment

In accordance with Listing Rule 9.6.14(2), National Grid notes that Nicola Shaw, UK Executive Director and a member of the National Grid plc Board is appointed as a Non-executive Director of International Consolidated Airlines Group, S.A , with effect from January 1, 2018.

Contact:

Ceri James, Company Secretarial Assistant (+44 20 7004 3116)