I have seen a couple of reactions saying that the July 4 date may impact on the student vote as they may be moving around the country in preparation for university.
I know nothing about term times or even if this is valid, but students can (apparently) be on the electoral roll for their home and for their university home, so long as they only vote at one location, so would imagine it shouldn’t be that big an issue.
On the topic of ID, I saw a report that said that the Minister of State for Veterans had asked that a Veteran’s ID card should be accepted at the polling station as a valid form of identification, but was knocked back. The reason given was that if it was accepted then they would have to accept student ID cards, which would make it easier for students to vote.