Britain's power supplies enough to meet winter demand - National Grid

By Nina Chestney LONDON (Reuters) - Britain will have enough electricity supply to meet demand this winter, after securing emergency back-up capacity, National Grid said on Friday. Britain is forecast to have a surplus power margin of 5.5 percent this winter, similar to what was forecast last winter, National Grid said in its 2016/17 winter review and consultation. "We believe the margin is manageable and that we have the right tools and services available, including extra power we can call on i