Mr. Robin McCormick:

We have a control link to generators of some size and we can send a signal to them to tell them to pull back a little bit if they are generating too much for the prevailing conditions. We do not have the same control over the small-scale wind farms and we do not have visibility over an individual wind turbine on a person's farm. We have to manage the demand that we anticipate. We try to forecast the demand for wind and then the output. We subtract a figure from the demand and we then schedule the large conventional generators, which might require ten hours' notice as they would need to get warmed up first.