My hon. Friend makes a really good point. Fish will move, perhaps because of water temperature or where the food is. Also, of course, they do not always swim together. Cod swim together and haddock swim together, so we can go out and make sure that we catch only one species of fish, but other types of fish swim separately, and we will often catch many species. That is especially the case in the south-west waters, where we are very much a mixed fishery, and that is why the discards are so important. We do not want the fishermen to target particular species, but we want them to be able to catch fish and land it all. The challenge is going to be making sure that we recompense fishermen for delivering fish that they did not have the quota to catch, but do not stimulate them into catching fish that they perhaps should not be catching.