We wouldn't do too badly in bringing forward building nuclear coal fired power stations bearing in mind that a huge amount of our power generating capacity will go offline within the next 10-15 years. Britain is in serious danger of having blackouts in the very near future because we haven't invested in new power stations.
The biggest problem with wind power is that it's unreliable and therefore you need massive coverage to compensate for the bits that aren't generating due to lack of wind. That makes it inefficient and therefore expensive.