Ginge - I thought that might be the case, which is why I mentioned Bristol in my answer. I did also think there might be a penalty if they didn't have separate containers, but I could be wrong. If they do not have separate containers it may mean that they empty the wheelie bins every week, which ought to solve the problem. In any case food waste should be well wrapped as suggested, because it is what the flies are looking for to lay their eggs. (Disgusting aren't they?)