In 1999 , then owners Innogy plc decided to take Blyth A out of operation , while Blyth B began operating only at times of peak demand .
The stations had become surplus to their generating needs .
In 1999 , then owners Innogy plc decided to take Blyth A out of operation , while Blyth B began operating only at times of peak demand , because the stations had become surplus to their generating needs .