AGREEMENT AND PLAN OF MERGER DATED AS OF FEBRUARY 25, 2006 between NATIONAL GRID PLC, NATIONAL GRID US8 INC. and KEYSPAN CORPORATIONMerger Agreement • June 20th, 2006 • National Grid PLC • Natural gas transmission • New York
Contract Type FiledJune 20th, 2006 Company Industry JurisdictionAGREEMENT AND PLAN OF MERGER, dated as of February 25, 2006 (this “Agreement”), by and among NATIONAL GRID PLC, a public limited company incorporated under the laws of England and Wales with registration number 4031152 (“Parent”), NATIONAL GRID US8 INC. a New York corporation (“Merger Sub”) and KEYSPAN CORPORATION, a New York corporation (“KeySpan”).