I’ve found an ad on Gumtree where the advertiser was suggesting potential customers for wasp nest removal service that he was better than the competition because he could take the wasp nest away, unlike the cowboys. (Along with live wasps still in it?) If this was the case I doubt it pretty much this wasp controller was any better than the cowboys the ad had referred to.
The correct wasp nest removal treatment (in line with BPCA and RSPH guidance) is application of insecticide into the nest and onto wasp alighting area. Except for at night, not all wasps are in the nest at the time of pest treatment; many wasps are out foraging for food. The insecticide (usually fast acting carbamates) will first kill the wasps in the treated nest while the rest of the wasps will be returning back to their nest later and also contracting lethal dose of the residual insecticide. The wasp nest usually clears within the first 24 hours on treatment if insecticide is applied directly into the wasp nest. If; however, only the surrounding area has been sprayed (dusted) it may take longer. Wasps will not come back to inhabit the same nest once used. After about 3 days, I recommend you to check (visually) the wasp nest for any remaining activity and if found clear you can proceed to physically removing the wasp bike I you wanted so. The common practice is leaving it in place to disintegrate. Disposal of a treated (void) wasp nest does not require any special skills. The nest is made of chewed wood and bits of plants, mixed with wasp saliva. You can use gloves and a normal bin bag to dispose of it into a communal waste.
Whether you are doing wasp nest removal treatment by yourself or hiring a wasp controller never physically remove (nor let them to do so) the wasp nest (commonly also called wasp bike) until a couple of days after the insecticidal treatment! If you did this you would end up with a lot of angry wasps flying about your area and looking for their nest. After all, other nests might even be built by the same wasps in the same area.
By Martin Kroupa