I've seen this story posted on environmental sites touting this as a success. But it's really just no coal on the island... when electricity imports should also be considered (there are interconnections between continental Europe, and also Ireland). And then there's the other big coal user: steel. A lot of British steel has left the island; it's just produced elsewhere and imported.
So good for British air-breathers, but it's not exactly green energy transformation as some may believe.