And I remember walking in there and, I must say, I was quite unnerved the closer I got to it.

Nobody could tell us or really had a very good idea, if there were a massive release of radiation, what kind of medical treatment people were going to need and this or that, or, indeed, whether there would be medical personnel around.

Another very strong image from the first day was giving my initial press conference in the morning - going down and finding out that everything I had said, the essence of what I had said, was wrong.

What I had said in the morning was that this is what we know has happened, but there has been no significant off-site release. Only to find out moments later that, in fact, there had been an off-site release. I still haven't gotten over that.

There were schools and hospitals who were ready to take people with undescribed injuries, but not necessarily ready to take people with severe radiation poisoning.

And I remember walking in there and, I must say, I was quite unnerved the closer I got to it.

By Thursday morning, we'd gotten over the worst of it.