When I have finished writing this post, all flights within UK airspace will have been suspended due to a cloud of ash in the upper atmosphere. The ash is being pumped out by a volcanic eruption in southwestern Iceland. The disruption is considerable, with tens of thousands of passengers unable to fly. People in Shetland are presently reporting a sulphurous smell. The cloud is expected to pass across northern Britain in an hour or so. It is not known how long the disruption will last, as this is tied to the volcanic eruption. Flights are grounded, because volcanic ash can cause considerable damage to aircraft engines.
Here in Lewis, we will therefore not have any mail, and the papers will be in this afternoon, on board the ferry. Not smelling any rotten eggs outside - yet.
More information on the BBC and many other websites.