Kitchen waste, grass clippings and paper go into the top layer and the worms start to munch. The bottom of the top 3 layers is a fine mesh so the worms can travel between levels and the munchings go through to the layer below.
Once in the second layer below the worms continue to munch. The munchings from that layer end up in layer three as very fine compost. Layer four fills with a dark brown liquid. There is a tap to access it. It is a liquid plant feed that is diluted 1 part to 10 parts water. It's like Guinness for tomatoes, probably even puts hairs on their chests.
2. The Compost Bins
Most of the compost-able materials goes into the compost bins. A mix of kitchen vegetable waste, grass cuttings, prunings and hedge cuttings that have been gone over with the lawn mower. To this is added paper and cardboard from those nice boxes that Amazon sends. this keeps the balance of nitrogen and carbon about right, hopefully. The worms help out here too but it much slower than in the wormery. It needs regular turning to speed things up. It's lucky if it gets turned over once in the space of a year but it gets there eventually. Even if if's a bit coarse it's usable as a mulch or mixed with John Innes 3 for growing tomatoes. The last photo shows a much finer grain compost that has had even longer.