This is possibly the largest incident of its kind in peacetime Europe.

The work of my firefighters and my officers has been magnificent. They have worked in extreme conditions, with extreme professionalism.

We are in uncharted territory. This is the largest fire of its kind that we in the U.K., and in Europe, have dealt with.

There are still some small bund (concrete container) fires, but the tanks are out.

Hertfordshire has had six recent training exercises on site in the last six months - the last one three weeks ago - and has worked closely with the site for many years to prepare for any incidents.

So, it just puts some perspective on what we're dealing with.