They are running them currently.
Running the earlier ones as well - with only an hour delay.
But I do see they have canceled the one out of LHR which would be the right plane. So it appears they are making up for lost time, by canceling the penultimate plane out of LHR and the last plane out of GVA. Rather than running several hours late. And saying it is due to the weather.
Sorry but I would rather be a few hours late, than half a day late to a weekend trip - removing a third of my weekend time with friends and family, and no compensation other than "sorry".
So nice of them.
