Simonpro,
"This is a slightly better, and less fiddled, sequence"
What do you mean? That's an mpg from three days ago, so not current.
Which thereby proves
threemiles wrong when he says that this is the first time the ash is 'clearly visible' to the satellite.
That particular sequence has been added by sat24.com after the eruption, and the only thing "fiddled" is that they've added a legend and a pointer indicating the volcano to the map overlay.
Not true. They have also normalised the pixel spacing. Something that, when you get as far north as Iceland, has a significant effect upon the data. It'd be interesting to know if the London VAAC normalise in a similar way, or whether they increase accuracy by using other sources of information.