We've had these Mrs B, the ground nests are pretty easy to deal with. I think we bought some sort of powder that we puffed into the hole. However tell hubby to be very careful as they have look out wasps that will sting anything they see as a threat. Hubby was stung repeatedly and developed an allergy. Subsequent stings made him react very violently.
Whilst I'm sure they have benefits in nature, wasps don't make particularly good close neighbours. One of the nests was within metres of our kitchen doors and the pesky things frequently flew in and caused problems. I remember once one getting caught in my daughter's hair and repeatedly stinging her scalp, it was awful!
Good luck with dealing with the critters x