I managed to get a bit closer later on and you could see an obvious wasp nest in the bush. I managed to get a photo and its clear that the big b****rs flying in/out of the nest have little or no yellow striping which accounts for my confusion at identifying them. I spoke to the local wildlife expert at work this morning and he reckons they are Median wasps which are bigger than the native version and are known to be particularly aggressive at defending the nest. Apparently an import from Europe escaping a warming continent! Keith |