Solution
The numbers of our native earthworm are declining thanks to this invasive worm - it loves to feast on them. Organic
Check sites where they like to hide undisturbed - for example under stones and pots - and dispose of any you find. Where there's one, invariably you'll find more. Where they are present, spread a sack on the ground, weigh it down and keep checking if more are hiding beneath. Eggs are usually found between June and September. Destroy the worms by squashing or dropping them into salty water.