I have a pair of those in my garden often, but still have loads of ants.
Not
a problem as they are in the lawn and nowhere near the house.

--
Tumbleweed

My front lawn is approx 4 ft away from house and anthills have started
appearing all over the lawn. I have been prodding these anthills with a
stick and dousing with water. However when I get rid of one nest another
appears.

What is the best solution, stamp on the anthill mound, will the mound
increase/decrease in size if left alone ?

Mike.