Mr. Nicholas Tarrant:

It is unusual and perhaps Mr. Rossiter can comment from the point of view of high voltage faults. They are rare but they do happen. We had a few significant outages in different places over the past two years but this was a specific one. I have seen pictures of the incident where a piece of equipment failed. We are looking to get to the bottom of it. I ask Mr. Rossiter to comment on the frequency of these incidents.