If you spot an Asian Hornet, please use this useful app to report it. Always keep at a safe distance and never approach a hornet’s nest…………..keep well clear.
https://play.google.com/store/apps/details?id=uk.ac.ceh.hornets&hl=en_GB
or for more information contact https://www.essexwaspcontrol.co.uk/hornet-nest-removal.php