Don't they do risk management any more?
Don't airports, the Department for Transport, National Security Council etc, employ people whose job is to identify risks and develop plans for dealing with them?
Since drones have been interacting with aircraft for several years now, this is hardly unexpected if your job is to think about bad things that could happen at airports. Perhaps all these people started their Christmas holidays about a decade ago. If not, then maybe they should all collectively put in for a transfer to the Department for Exiting the EU, where they will feel right at home.