The amount of food waste in the UK is a huge number, particularly if you translate it into animals. Much of what’s being done about it is in the reduction phase, by redistributing food.
What we don’t know is: are there hotspots for food waste? Supermarkets like Tesco have informal arrangements with charities to pass on food, but don’t really track the wastage systematically. It’s also hard to quantify what is food waste, and what isn’t. All the councils have to report “green” waste that includes garden and plant waste, so it’s hard to separate it. But they don’t track where it goes and how it is treated.
From the value chain perspective it’s better for food to be redistributed rather than recycled.