Special Information for Former YES holders

The merger between Yankee Energy System, Inc. and Northeast Utilities was completed on March 1, 2000.

Any former holders of YES shares who have not yet exchanged their shares for cash and shares of NU should contact the Exchange and Paying Agent, Mellon Investor Services (MIS) to obtain the forms and instructions for doing so.

MIS can be reached toll-free at (888) 567-8310.