Block listing Interim Review

Name of applicant:

National Grid plc

Name of scheme:

Employee Share Schemes

Period of return:

From:

1 September 2016

To:

28 February 2017

Balance of unallotted securities under scheme(s) from previous return:

1,289,177

Plus: The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):

NIL

Less: Number of securities issued/allotted under scheme(s) during period (see LR3.5.7G):

NIL

Equals: Balance under scheme(s) not yet issued/allotted at end of period:

1,289,177

Name of contact:

Robin Kerner

Telephone number of contact:

0207 004 3223