Notify everyone and you may get hornet tourists clogging up sites.
its going to be everyone for themselves as per circumstances. Wouldn't expect anything else. Lots of interesting solutions (spend money) on line. Bee unit will not be able to cope with next years nest numbers, they will do their best but it won't be enough, so don't expect anything and you won't be disappointed.
But one thing they must do is tell us the area of the nests they find so we can check our apiaries. This" undisclosed location" is total crap and helps no-one.