Some have said that the comparison between Helsinki and LHR is invalid. I don't quite see why. Helsinki has fewer passengers and presumably less revenue and yet it copes far better than LHR. Why? Investment.
OK - it might have a third runway and I can see how that makes things easier but surely LHR could adopt a one runway operation (albeit at a seriously curtailed level of service) by clearing the other one?
LGW was castigated (quite understandably) the other day when they were closed down but my understanding is that they got their finger out and got some more snow clearing equipment.