Until I see some a/c on finals into LHR I wouldn't assume anything. There's a lot going on right now and whilst the change of directive appears to have occured suddenly, I think the most important matter is safe landings into LHR if this is what has been decided. No doubt there will be many 'post match' reviews in the coming days. So for the first time in a while I'm happy to track the inbounds and hope we have no issues.
And is that an Iceland Air that's popping down to LHR? How poetic...