We've had ants in the garden for a few years but they have always been far enough away from the areas we use that we didn't really bother.
However last night I went out to the patio and saw a huge number of ants crawling around the base of our parasol.
I lifted it up and found thousands of ants and ant flys living under it.
I lifted them all and doused the area in boiling water and bleach and got it down all the little holes I could see.
I wanted half an hour and did the same again to get any that were left.
Then later on that night I did boiling water and salt.
This morning I've gone out and they seem to be multiplying again. They are also ruining my blocking as that are making holes in the mortar.
Is there a way to get rid of them or does it need a professional?