Don't you be tainting UK ants with the same brush as the Australian fire ant (the Pete Doherty of all antkind).
The fire ants live in Queensland and guess what is the main crop grown in Queensland?
Yup - sugar cane (aka PURE ant crack)
These ants have evolved as a result of all the chemicals they've been treated with to try and get rid of them and they are now a bit like "super ants" ......