SYRACUSE -- Niagara Mohawk Power Corp., a subsidiary of National Grid plc (NYSE: NGG), has declared dividends at the following rates for all series of its preferred stock:

.85% of $100 par value, 3.40% Series;

.90% of $100 par value, 3.60% Series;

.975% of $100 par value, 3.90% Series.

Preferred stock dividends are payable March 31, 2011, to holders of record February 28, 2011; ex-dividend date February 24, 2011.