About a year ago I started a wormery out of an old plastic water tank to recycle garden waste, mainly grass cuttings and dead leaves. It has been very successful and produced a lot of good quality compost. Last time I turned the soil over,however, I could see very few worms. Instead there were dozens of large, fat millipedes. I understand that millipedes also munch garden waste so that is not too bad. What has happened to the worms though ? Can millipedes drive out worms? - Ian.