New info gets posted on another thread, - and I am fine, thank you
Apart from the ashes being a proper "stopper" of jet engines, they are also poisoned. There are some isotopes with lots of Fluor in it, and this will poison both surface water and pasture, although only for a short time.
I do not know how far those travel, - if they are bound only to the heavier ash, or if they also fly with the finer ones, but I seriously hope that your agriculture does not get a dose of that filth.
There is but one remedy for lifestock in the open, - fence it off or close it in where there can be no access to pasture and surface water, and wait it off. For us, in the winter-time, this is but a minor nuicanse. In the summer, it is really bad. For the UK, it would be very bad, since much of for instance sheep and beef cattle rely much more on pasture and less winter-feed than our stock, - we have a longer winter to deal with, see.
Crossing my fingers for you Brits. And Norwegians.
The weather forecast is not in your favour, winds coming from the North and the North-west in the next days. It is a rather rare direction of wind though, so I always am a bit sceptic of long spells of NW wind. A pure N-wind would blow the ashes to the sea, which is the best, but could stop trans-atlantic flights instead. Or cause a re-route, where you would have to fly over Iceland on the way USA-EUROPE....