SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 

 

FORM 11-K

 

 

 

ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

 

 

For the fiscal year ended December 31, 2006

 

OR

 

o

TRANSITION REPORT PURSUANT TO 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

 

For the transition period from __________ to __________

 

 

Commission File Number 1-14958

 

 

National Grid USA Companies’

Incentive Thrift Plan II

National Grid USA

25 Research Drive

Westborough, MA 01582

 

 

National Grid plc

1-3 Strand

London WC2N 5EH

England


REQUIRED INFORMATION

 

The financial statements required by Form 11-K are filed as exhibits and incorporated herein by reference.

 

 

EXHIBITS

 

99.1

Financial statements of National Grid USA Companies’ Incentive Thrift Plan II

 

 

99.2

Consent of PricewaterhouseCoopers LLP, independent registered public accounting firm

 

 

 

 

SIGNATURE

 

Pursuant to the requirements of the Securities Exchange Act of 1934, the National Grid USA Service Company, Inc. Benefits Committee (the Plan Administrator for the National Grid USA Companies’ Incentive Thrift Plan II) has duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.

 

 

NATIONAL GRID USA COMPANIES’ INCENTIVE THRIFT PLAN II

 

 

 

 

 

 

 

 

 

Date: June 27, 2007

By

/s/ Robert H. McLaren                                   
Robert H. McLaren
Chairman

National Grid USA Service Company, Inc.
Benefits Committee