Progress report:
NB the wasps are in my son's garden, not mine.
He tried drowning the nest by running the hose in the hole. The wasps
have relocated into a nearby wall; (or maybe the nest was in the wall
and had another entrance!)
My son has tried to buy wasp killer, at B&Q and another place with no
success.
Thanks Charlie for the derris dust idea. It sounds safer and kinder
to the lavender bush than diesel or similar!


Pam in Bristol