Jacob Rees-Mogg, one of the Toriest of Tories, actually admitted that they'd shot themselves in the foot (he may even have used those exact words) by introducing voter ID at the last elections; a larger contingent of the Conservative-voting public than for other parties was unable to vote due to not having the requisite ID.
Many Conservative voters are scared shut-in curtain-twitchers who think the world's gone mad (I mean they're not wrong on that count, I speak as a shut-in myself), but that fear, for various reasons, makes them keep voting Conservative. Kind of hard to get ID if all you do is stay at home and your only way of staying informed is to read the Mail and Express every day, it would seem.
Thus, I would have thought the Cons would have found some excuse to get rid of it before the next lot of elections.
But then, that might mean getting the whole party to agree that it was a mistake rather than the occasional stopped clock.