You need to show an accepted form of photographic identification (photo ID) at a polling station when you cast your vote in most elections.
Accepted forms of photo ID
The majority of voters will already have an accepted form of ID.
What to do if you don't have an accepted form of photo ID
If you do not have an accepted form of photo ID, you can apply for a free photo ID called a Voter Authority Certificate from GOV.UK.
More information on updated voter ID legislation
You can.