All you need to take with you to the polling station is an accepted form of photo ID.

Find out which forms of ID are accepted: https://www.electoralcommission.org.uk/…/accepted-forms…
If you’re not sure where your polling station is, use our tool to find out: https://www.electoralcommission.org.uk/…/your-election…

Tellers
You might see people waiting outside the polling station who ask you for the number on your poll card.
These people are called ‘tellers’, and are volunteering on behalf of candidates. They use the information people give them to check who has voted, and remind people who haven’t to do so.
They are allowed to be there and to ask for the information, but you don’t have to give them any information if you don’t want to.
If you are concerned about the conduct of a teller, speak to a member of staff at the polling station.