We passed Seljalandsfoss, and after a couple of hours we reached Hvolsvöllur. Seven vehicles were attempting the trip, and tiny Hvolsvöllur was briefly overrun by volcano tourists. I bought a coffee and weirdly spotted someone who I'd met in Greenland last year. I didn't have time to say hello before we were back in the jeep and heading onwards. We reached a turning where a rough dirt track disappeared into the mist. Somewhere up in the clouds were the Eyjafjallajökull and Myrdalsjökull glaciers, and in between the two, a split in the Earth's crust from which molten rock was spurting. It hardly seemed possible.
We stopped to reduce the tyre pressures and coordinate the convoy, and then we headed uphill. Our route would take us high up onto the Myrdalsjökull, and then down into the pass.