[DavidT]

Neil, if the only place you have for a bin is on concrete, then you may get away with it if you use a wooden one, This will let air in through the sides, you would need to add worms though. If you are using a plastic one, it should be on soil. I`m not a fan of these plastic ones because the compost always seems cold and very wet. Sarina, non shiny paper is fine as are leaves, though these will take a lot longer to break down. Trash clippings, the same as leaves if there are lots of woody bits.