I’m on holiday in El Hierro again. OK, so I’m now sitting on the flank of an active volcano, but there’s not much to notice where I’m staying, except that the sea has gone green. I suspect that this is stuff coming out of the undersea eruption, brought here by the ocean currents. Anyway, I’ve gone off the idea of swimming in it. All the same, I’m having a great time with my friend, chilling out and getting plenty of gentle exercise to try to get fit after my operation.