A friend of my wife has worked as a presiding officer at a local polling station for nearly 30 years. She reports that recently she has had many acquaintances asking her if it is possible for someone to determine how they voted? She has never been asked that before in all her years as a presiding officer.
So why is the question being asked? Quite simply these people are frightened of the consequences if the vote is "yes" and someone determines that they personally voted "no". Such fears might be totally groundless, that's easy to say, but is largely irrelevant. The point is that these fears exist and are very real to some people.
Whichever side of the argument you sit, I would ask, what have we become?