 So when we have that kind of population decline, there are two big problems. The first is a society, first of all, gets very old. And that has all sorts of problems for government finance, for labour shortages, who's going to look after the elderly. Japan has this problem in spades and has a massive government debt-to-GDP ratio. The whole financial system could come crashing down. And then eventually populations actually start declining. In the UK as a whole now, we probably have more deaths every year than births. Without immigration, our population would be declining.