In the case of by-elections, quite rightly, the bill will not allow electors to transfer from one roll to another, with the objection being, no doubt, that to do so would allow a system where someone could choose to be on one roll or the other at an opportune moment and an opportune place—that is to say, where a by-election is taking place—and thereby gain some advantage. We don't know how widespread such a practice would be if allowed. In the case of by-elections, of course, we don't always know when by-elections will take place, and that's the nature of them, of course. But the possibility of such a practice and the existence of legislation that would allow that is something that this House should resist. So, pleasingly—and I give credit where it's due—in the case of the by-elections, the Government has acknowledged this possibility and has moved to guard against it. 