According to this news story a man was told at a polling station that he should not be voting.
What can I say, other than if true I find this really shocking. The idea of disenfranchising people is not what democracy is about.
The story says that the returning officer has launched an investigation, so until the investigation has finished there will be no proof that the alleged event happened, not will the person be able to be identified. Needless to say that if it happened then it stinks.