The idea from the off, really. We dont know yet if they will choose to go down that path. If they do, it would be the first real test of minimum service levels. Katy austin, our transport correspondent, thank you. A Volcano In Iceland that has erupted for the second time in a month spewing lava into a nearby Fishing Port and setting several homes on fire. Most of grindavik� s 4,000 people had already been evacuated. Our Science EditorRebecca Morelle reports. The unstoppable power of a volcano, as houses are lost to the lava. The rapidly built defences couldnt hold back the moving wall of fire. This is a country that is used to living under the threat of eruptions. Why is iceland so volcanically active . It sits on the mid atlantic ridge, the boundary between and the North American tectonic plate. They are slowly pulling apart from each other, but iceland is also