These factsheets have just been brought to our attention by Frank Gellatly.
The HORNET (Vespa crabco) exists in the UK but has not been reported in Pembrokeshire. It is not a pest and is generally docile.
The ASIAN HORNET (Vespa velutina) has not reached the UK but is spreading through France. It is reported as preying on adult bees but not brood although narrowing the hive entrance is recommended.
For both species only the queens overwinter and will start a new nest in the spring.
Both factsheets contain details of how to report any sightings.