One of our bee inspectors advises that she has spent the best part of September in England chasing Asian hornets and the monitoring going on by the public has been variable. The only chance of preventing them from becoming a huge problem is to stop them early.
This is a link to the NBU Asian hornet trap
Note that Asian hornets are apparently quite hard to ID when they’ve been in a trap for a while, so people need to have a good look.
The most Asian Hornets have been seen on ivy and other forage, picking off flys and other insects (as this is easier than hawking in front of a hive) so if everyone could spend half an hour every so often watching some forage there’s a chance of spotting them if they’re here.
If anyone does spot something suspect then THEY NEED TO TAKE A PHOTO OR CATCH ONE AND PUT IT IN ALCOHOL OR THE FREEZER. The bee unit and non-native species have had over 4000 reports of Asian hornets that are actually something else (one was a cockroach!) people can also download the Asian hornet app, which has ID info and you can report sightings.