Nodding through, although members may not recognize this description—I mean my members—is actually a form of proxy voting. A member is in the precinct but too infirm or uncomfortable for it to be reasonable to ask them to pass physically through the voting lobbies. We vote by passing through lobbies, past a desk at which the name is taken, and members are then counted, unlike standing in the chamber.
If you are ill or, for example, on crutches temporarily or indeed permanently and the whips of both major parties agree, they will confirm that the member is in the precinct. They will then discover which way he or she wishes their vote to be cast, and then one of the whips will act in effect as a proxy in order to cast that vote. It is pretty rare. It is mainly used, as I said, for those who are either quite seriously ill or temporarily or permanently incapacitated physically. It has, I believe, been used recently for those who are in the final stages of pregnancy or who are nursing an infant.