We had friends coming 'up north' for the weekend from Brighton. Only he came up in the end on Friday as they had booked BA from LGW and didn't want it to wreck the weekend completely...
We checked last night for his return flight, everything seemed ok, first two cancelled but later two appeared ok!
Checked one last time before I went to bed and ALL four have been cancelled..
Now we have to see whether we can get him home via rail, which we don't think we will have a problem but like you say not only is it a bit of a mess at the moment, but i bet there is a few modes of transport who are making very good business from it all...