We have a blue bin and a brown bin which are emptied fortnightly at the same time and a green bin which is emptied on the alternate weeks. The blue bin is for paper and cardboard, the brown bin is for anything compostible (garden waste, food waste etc) and the council gives us a free bag of compost once or twice a year. The green bin is for all the other things which can't be recycled. It seems to work very well and we never have full green or blue bins, but it would be good it they emptied the brown bin every week, as, if you do a lot of grass cutting, pruning etc, and the bin fills up, either you have to stop gardening for a week or so or put the garden waste in a bin liner and refill the brown bin once it has been emptied. We only have a smallish garden, so it must be a nightmare if you have a big garden.