There's high tech and there's low tech. The compost heap is pretty low as tech goes: make a heap, turn it over once in a while, let time and nature do the rest.
 This particular heap will be all garden "waste" beginning with the stuff I've pruned, weeded, raked etc. from last autumn till now. I bagged it up as I went along as an interim step; the composting starts in the bags anyway.
 This is compost heap mark 2 compared to what was there before which was even more basic (just a heap basically). The canes are cut from the bamboo in the garden and the screen is locally sourced from artisans who work on the banks of the river Wandle.
 Actually I made that last bit up. The screen was purchased from a DIY superstore on the Old Kent Road. Sometimes it's not easy to be a completely natural man in the middle of London...