Ok this talks about food waste on the personal level (not necessarily the leading cause of food waste as much is wasted long before it reaches the consumer) and isn't quantified, but how many of these reasons do you relate to:
http://realsociology.edublogs.org/20...ood-in-the-uk/
The mini-supermarket? check The lazy? check The ingredients bought for one recipe? check the occasional whimsical desire? check