"You could just pop your obsolete laptop in your compost bin alongside the grass cuttings, egg shells and potato peel."
They'd need to do a better job than the so-called compostable plastic bags. A few years ago there were allegedly compostable bags for collecting kitchen waste. The waste composted, the bags didn't. Similarly the so-called bio-degradeable plastic bags the Co-op sold vegetables in. There seems to be a new generation in that in the last few days National Trust, English Heritage and Gardening Which magazines have all arrived in bags which claim to be compostable. We shall see - although I might pose it as a question to GW.
I discovered, however, that Morrisons' paper bags are bio-degradeable. More than three carrots weight and they fall to pieces.