Edison: Standard & Poor's affirms its “BBB+” rating

Public disclosure required by Consob Resolution No. 11971 of May 14, 1999, as amended.

Milan, May 12, 2006 - Standard & Poor's Ratings Services today affirmed its “ BBB+” long-term corporate credit rating on Edison, following its review. The outlook is stable.

The rating reflects Edison’s strong business position in Italy, also after the new shareholders’ agreements which is seen as a positive stability factor for the future, as well as favorable domestic energy growth prospects.